File:No file chosenWhenever electrons of an atom unite with electrons of another atom, a chemical change occurs.

What is the cause?
What kind of change occurs?
Water expands when it freezes. Expanded ice floats on lakes and ponds.

What causes the water to expand?
What is the effect on the expanded ice?
Some metals will expand when heated. Expanded metals may bend.

What causes the metal to expand?
What are the effects of the expanded metal?
Gases expand when heated. An expanded gas occupies more space.

What causes the gas to expand?
What are the effects of the expanded gases?
Answer the above questions and give an example of a cause and effect relationship. See if you can think up a cause and effect relationship using acids, bases, and neutralization.

Answers

Answer 1

Answer:

Answer:

C. would be the correct option

Explanation:

Burning gasoline is a chemical change because when gasoline is ignited, water and carbon dioxide are produced. Water freezing to form ice would be a physical change since its state of matter has changed, but not the water itself. Sugar dissolving in water is also a physical change because all it's really doing is just forming bubbles and changing the color. Choice D. would also be a physical change since the piece of metal is still a piece of metal, it just expanded when the temperature increased.

Related Questions

The graph below shows the blackbody radiation curves for four stars.Based on the graph, which of these conclusions is correct? The star with very long wavelength does not emit light in the red part of the spectrum. The star with very short wavelength does not emit light in the blue part of the spectrum. The star with a wavelength of approximately 500 nm does not emit light in the green part of the spectrum. The star with a wavelength of approximately 500 nm does not emit light in the red part of the spectrum.
In which space, outdoors or in your classroom, would it be easier to hear a musician? Explain
Who was the man who lived from 460B.C.–370B.C. and was among the first to suggest the idea of atoms?a. Atomosc. Democritusb. Daltond. Thomson Please select the best answer from the choices provided A B C D
How is a combustion reaction like the respiration reaction? list as many similarities as you can
Assume that all four H-R diagrams below represent a star in different stages of its life, after it starts to fuse hydrogen in its core. Rank the HR diagrams based on when each stage occurs, from first to last.

Suppose that you hear a clap of thunder 16.2 s (seconds) after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00*10^8 m/s. How far are you from the lightning stroke?

Answers

since the speed of sound is very high, we consider the time period of thunder and lightening negligible.

Now, d = vt

thus, d = 343 x 16.2

thus, d = 5556.6 metres

Thus, we are 5556.6 metres away from lightening ( approximately)

Adding an organism to a food chain does not affect the other members of the food chain, but removing an organism does.

Answers

This is false. Say you have a food chain where a monkey is the top predator. Then you introduce something that eats what the monkey does. The monkey populations will plummet and that means that the things they eat will start to get more numbers. Adding and subtracting animals throws everything out of order.

Removing any level from an ecosystem disrupts a delicate balance that may have ;and a diverse, with many levels and intricate relationships between organisms. More predators kill more prey, which, along with food scarcity, decreases the an attempt to control the population, but it had no effect on habitat degradation.

There was frost on the ground overnight because the temperature dropped. In addition, there was cold, damp moisture in the air. This may mean that there is a good chance of _____ in the morning. precipitation fog sunshine thunderstorms

Answers

Answer: Fog

Explanation:

Fog can be defined as the clouds on ground. Fog is made of condensed air and that is being cooled down to the point where it cannot hold more water.

The frost overnight forms fog. During the long nights the air gets cooled down and the the moisture in the air also adds to the formation of fog.

Thus, the correct answer is fog.

The answer would be fog.

Aristotle, the ancient Greek philosopher, thought that heavy objects fall to Earth faster than lighter objects. How could Aristotle's hypothesis be supported or disproved?

Answers

Gravitational potential energy=mass of object x gravitational field strength on earth(9.8 usually rounded to 10) x the height the object is held at

Therefore if two objects were held at the same height, the object with more mass(the heavier object) will fall faster because it's gravitational potential energy is greater than that of the lighter object

According to the periodic table, the average atomic mass of helium is A) 2 amu. B) 2.0026 amu. C) 4.0026 amu. D) 6.0026 amu.