When a strip of zinc metal is added to a test tube of hydrochloric acid, the liquid forms bubbles, and the test tube feels hot. The bubbles are a result of the formation of hydrogen gas. What does the hot test tube indicate?
A.
Hydrogen gas absorbs heat.
B.
The reaction releases heat.
C.
A chemical change has been reversed.
D.
The reaction absorbs heat.

Answers

Answer 1
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Related Questions

help please thank u skskskskz

Answers

Answer:

top

Explanation: BTW u got a good idea to cover the camerra in the classroom :D

Answer:

side

Explanation:

Is this correct if not what is the correct answer

Answers

Answer:

Yes, you're answer is correct

As,

The amount of oxygen will decrease as the trees can't undergo photosynthesis.

Answer:

your answer is wrong it's the next one donw

Fish

What would be the biggest fish in the ocean? (Not including sharks, whales)


Another fun/random question for you guys)

Answers

Answer:

would it be the oarfish?

Write at least 3 sentences explaining why plants are so important to humans. *

Answers

Answer:

Please mark brainliest :)

Explanation:

Plants provide oxygen for humans through photosynthesis. They can store carbon which is a greenhouse gas. Plants are a staple in humans' diets. Bonus: They are a source of income for farmers. They hold important vitamins. They can be beneficial to healthy soil and keep it from blowing away or eroding.

Hope this helped :)

Which of the following statements about fungi is true?

a. All fungi are unicellular
b. All fungi have cell walls
c. All fungi are prokaryotic
d. All fungi are autotrophic ​

Answers

it is c im pretty sure

All fungi have cell walls. So, the correct option is B.

What are Fungi?

A fungus is defined as a member of a group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms.

These belong to kingdom Fungi having a cell wall. Among the living organisms, they belong to heterotrophs category. They are classified as plants but do not contain chlorophyll. Their cell wall is made of chitin through which nutrients is obtain by the process called absorption.

They are either decomposers or parasites that obtain their food from other organisms. Fungi are both unicellular and multicellular like yeast is unicellular while other fungi are multicellular.

Thus, all fungi have cell walls. So, the correct option is B.

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6. Which of the following is NOT true of the excretory system? a. Kidneys remove waste from the blood b. Removes waste from sweating c. Excretes feces d. Excretes urine

Answers

I think it’s b because the other ones seem true. Sorry if I’m wrong

Kidney waste from sweating is not true of the excretory system.

The correct answer is option B.

What does the excretory system do?

The principal function of the urinary system is to maintain the volume and composition of body fluids within normal limits. One aspect of this function is to rid the body of waste products that accumulate as a result of cellular metabolism, and, because of this, it is sometimes referred to as the excretory system.

What are the parts of the excretory system and their functions?

The primary excretory organs in the human body are the kidneys, ureters, and urinary bladder, involved with the creation and expulsion of urine. Through these organs, much of the nitrogenous waste of the body, especially urea, is expelled.

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2. Drag the parent over to the Parent 1 space and press Reproduce. Fill in the Offspring traits on the table above. What traits appear to be inherited from the parent?

Answers

Answer:

All of the traits were inherited from the parent to the offspring except for the tattoo.Because this offspring inherits its traits from one parent, it is called a clone.

Explanation in https://www.coursehero.com/file/24431979/InheritanceSE-Geigerdoc/

Valves can be found in which of the following structures?

Answers

Answer:

In the heart.

hope it helps !

5 types of fungus that play a role in the lives of humans​

Answers

A limited number of species are commonly associated with humans as colonizers and opportunistic pathogens: C. albicans, Candida glabrata, Candida parapsilosis, Candida tropicalis, Candida lusitaniae, and Candida krusei.
penicillin(medicine) and food are 2

explain the circulation of blood​

Answers

Explanation:

blood comes into the right atruim from the body

Answer:

The circulation of blood is where basically the blood comes or goes into the right atrium from the body, this then moves into the right ventricle and is then pushed into what is called the pulmonary arteries in the lungs of a human. Once it has picked up oxygen, the blood will then travel back to the heart through the pulmonary veins, but this time it will go into the left atrium, so to the left ventricle and including out to the human body's tissues through the aorta.

I hope this helps you

Which of these Is NOT a type of habitat?

A) a desert
B) a mountain
C) a rainforest
D) the world

Answers

Answer:

D

Explanation:

Its kinda hard to explain but the world is more like a planet(?) and not a type of habitat since anything can live on it

Answer:

D- the world

Explanation:

Explain why your model improves upon the student’s original model. How would your model help someone who was learning about photosynthesis for the first time?

Answers

Answer:

Determine how many groups you will have.  

Prepare ping-pong balls.  

Collect egg cartons.  

Prepare the egg cartons.  

Prepare “energy tokens.”  

 Post signs in the classroom.  

 Prepare filled H20 and C02 “molecules.”

Explanation:

Photosynthesis occurs in two stages. In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the energy-storage molecules ATP and NADPH. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.

Answer:

This new model may better explain the elements required for photosynthesis to occur. Sunlight, water, and carbon dioxide are required for the plant to produce its own food. Someone who is unfamiliar with the process of photosynthesis must begin with the basics and then build on this knowledge.


The oxygen and carbon dioxide exchange that occurs during photosynthesis and respiration help to

Answers

release carbohydrates

The oxygen and carbon dioxide exchange that occurs during photosynthesis and respiration aid in the release of carbon dioxide and the utilization of oxygen produced by the photosynthetic process.

What is the significance of respiration and photosynthesis?

The photosynthetic process is the one that can make oxygen as a product, and later that oxygen is used by plants and other animals in the process of respiration, which is essential for life as the cell makes energy in this process. Plants and other chloroplast-containing photosynthetic organisms, such as blue-green algae, phytoplanktons, etc., can produce oxygen, which is then used in respiration to power the cell's activities.

Hence, the oxygen and carbon dioxide exchange that occurs during photosynthesis and respiration aid in the release of carbon dioxide and the utilization of oxygen produced by the photosynthetic process.

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Could you help me? Please I was thinking but couldn't find a answer for it.

Answers

I could try help, what is the answer you are looking for?

Do plants with shallow roots or deep contain a greater amount of radioactive substances?

Answers

Answer:

yes

Explanation:

roots that are deep get to more radioactive material underneath the earth

It is correct that the roots that are deep contain a greater amount of radioactive substances.

What are radioactive substances?

Radioactive substances are atoms that naturally decay. They have the ability to emit alpha particles, beta particles, and gamma radiation.

Because they cannot be turned off like X-ray sources, they are more difficult to control.

Radioactive substances emit three types of dangerous radiation: alpha particles, beta particles, and gamma rays.

A substance is said to be radioactive if it contains unstable nuclei and can naturally release energy by shedding high-speed charged particles in an attempt to achieve a stable state.

However apart from the heat produced by the planet's establishment, radioactive potassium, uranium, as well as thorium are presumed to be the three principal sources of heat in the Earth's interior.

Thus, it can be concluded that the deeper roots will encounter more radioactive substances.

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Everyday we observe chemical and physical changes in the matter around us. Which statement correctly describes a physical or chemical change? ( EXPLAIN WHY THE ANSWER IS CORRECT)

a. Physical changes create new compounds
b. Chemical changes break the bonds between atoms.
c. Chemical changes alter only the phase of a substance
d. Physical changes alter the composition of the starting materials.

Answers

Answer:. Physical changes create new compounds

Explanation:

i think

The fact that brown moths are easier to see and less likely to survive is known as

Answers

Answer:

Selection

Explanation:

Selection, in biology, the preferential survival, and reproduction or preferential elimination of individuals with certain genotypes (genetic compositions), by means of natural or artificial controlling factors.

The fact that brown moths are easier to see and less likely to survive is know as natural selection

Which resource is a renewable resource Coal,gemstones,metal,trees

Answers

Answer:

trees

Explanation:

Answer:

Just took the quiz , It's D trees

Explanation:

Trust

Distinguish between apocarpous and syncarpous

Answers

1.The Flower Has Several Ovaries In Apocarpous.There is a single ovary in syncarpous
2. On maturity apocarpous ovary forms fruitlet of aggregate type. on maturity syncarpous ovary forms a simple fruit.
Hope either of these helped

Identify one possible air pressure at the center of the low-pressure system.

Answers


High in the atmosphere, air pressure decreases. ... A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.

30 POINTS!!! PLZZZ HELP
1. What processes create igneous rocks?
2. What processes create metamorphic rocks?
3. What processes create sedimentary rocks?

Answers

Answer:

Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust.

Sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification. Erosion and weathering include the effects of wind and rain, which slowly break down large rocks into smaller ones.

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

Explanation:

Answer:

1. Igneous rocks form when magma molten rocks cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.

2. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.

3. The most important geological processes that lead to the creation of sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification. Erosion and weathering include the effects of wind and rain, which slowly break down large rocks into smaller ones.

Hope it Help!~

8. Why is there only one kind of enzyme for each biochemical reaction?

Answers

An enzyme needs to match the active site so they can interact in a precise matter. they are specific because they each have a certain thing to do.

22. According to the following picture, if the middle dashed line represents a phospholipid bilayer in which the red solute may not pass, in which direction will the net amount of water flow? a to the left b to the right C neither d both​

Answers

Answer:

D) Both

Explanation:

If the liquid cannot pass through the present phospholipid bilayer it must travel elsewhere left or right.

How is water stored on Earth during the water cycle?

Answers

Water can be stored on the surface of the Earth and underground. The water storage areas are known as reservoirs and include oceans, glacier ice, groundwater, lakes, soil moisture, living organisms, the atmosphere, and rivers.

What do scientists think collapsed that started the process of the formation of the planets?

A- A comet
B-a planetesimal
C- an interstellar cloud
D- an asteroid

Answers

Answer:

d asteriod

big bang theory was formed by two massive asteriod

PLZ HELP!!! WILL MARK THE BRAINLIEST IF ANSWER IS CORRECT.

Relevant Scenario: When explaining dominant and

recessive traits to a younger family member, they respond,

"Well chances are I can probably taste PTC, since dominant

traits are more common." How might you address this

misconception?

Answers

Answer:

Dominance of an allele does not make it more frequent in the population.

Explanation:

what are the respiratory movement of Man?Are they same in a grasshopper or a fish?

Answers

Answer:

Respiratory movements are the muscular movement that helps in the entry or exit of air to and from the respiratory organs of an animal. The mechanism of the respiratory movement can be different in different animals.

In man, the respiration movements involve inspiration and expiration by the expansion and contraction of the thoracic cavity that leads to the flow of oxygen and carbon dioxide to and from the lungs.

In insects such as grasshopper, the flow of the air moves through the tracheae by rhythmic relaxation and contraction of abdominal muscles. In fish respiratory movements involves entering the oxygen through their mouth and release CO2 from the gills.

Which of the following is a function of the lymphatic system?
a.
filters blood
c.
produces red blood cells
b.
absorbs nutrients
d.
produces bone marrow



Please select the best answer from the choices provided


A
B
C
D

Answers

A-Filters Blood
YW;)

Use the model of meiosis that you made earlier in the lesson to explain how crossing over contributes to genetic diversity. How did you modify your model? How do you think crossing over affects the expression of certain traits compared to the cells where crossing over didn't occur?

Answers

Hello. You have not shown the model of meiosis to which the question refers, which makes it impossible for this question to be answered accurately. However, I will try to help you in the best possible way.

Crossing over is a genetic phenomenon that occurs when two sister chromatids are broken at some points and the pieces are exchanged between them. these exchanges cause the appearance of completely new gene sequences, which can completely affect the expression of stretches in the cells where the crossing over happened, since this cell will have a different gene sequence than the others.

As you may already know, chromosomes are formed by two filaments, called a chromatid. These filaments are united by the centromeros and the union of two filaments and a centromero is called sister chromatides.

Of the four points shown on the diagram, deposition is greatest at points

Answers

Answer: I would say B and C.

Explination: Deposition is material deposited in a new spot. On points B and C, it appears the residue from the water would end up on those river banks.

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