12/11/22 Extra Credit: Q2 Matter and Energy

Front

Anything that takes up space and has mass is...

Back

Matter

Answer explanation

Anything that takes up space and has mass is defined as matter. This includes all physical substances, making 'Matter' the correct answer, while the other options do not fit this definition.

Front

Energy that causes a change in temperature between materials

Back

Thermal Energy

Answer explanation

Thermal energy is the energy that causes a change in temperature between materials. It is the correct choice as it directly relates to heat transfer and temperature changes, unlike the other options.

Front

Students place ice cubes outside on the ground, on a hot summer day. Which best describes how the ice cubes change over time?

Back

Solid to liquid to gas

Answer explanation

On a hot summer day, ice cubes (solid) melt into water (liquid) due to heat. As the temperature rises further, the water evaporates into vapor (gas). Thus, the correct sequence is solid to liquid to gas.

Front

Which phase change is happening at the boiling point?

Back

liquid to gas

Answer explanation

At the boiling point, a liquid transitions to a gas. This process occurs when the liquid's temperature reaches a point where its vapor pressure equals the atmospheric pressure, allowing molecules to escape into the gas phase.

Front

Which phase change is happening at freezing point?

Back

liquid to solid

Answer explanation

At freezing point, a liquid transitions to a solid. This process is called solidification, where the temperature drops enough for the liquid's molecules to arrange into a fixed structure, forming a solid.

Front

What is water's melting point?

Back

0 C

Answer explanation

Water's melting point is 0 C, which is equivalent to 32 F. This is the temperature at which ice turns into liquid water. Therefore, the correct answer is 0 C.

Front

Which phase change is happening at water melting point?

Back

solid to liquid

Answer explanation

At the melting point of water, solid ice transitions to liquid water. This process is known as melting, which is the conversion of a solid to a liquid, making 'solid to liquid' the correct answer.

Front

At room temperature helium does not have a definite shape or volume. Which state is it in?

Back

gas

Answer explanation

At room temperature, helium exists as a gas because it does not have a definite shape or volume. Gases fill their container and can expand, which is characteristic of the gaseous state.

Front

At higher temperatures, particles in an object move faster.

Back

particles in an object move faster

Answer explanation

At higher temperatures, particles in an object gain energy, causing them to move faster. This increased motion is characteristic of higher thermal energy, making 'particles in an object move faster' the correct choice.

Front

Name the phase change.

Back

Melting

Answer explanation

Melting is the phase change from solid to liquid, occurring when a substance absorbs heat. This distinguishes it from the other options, which represent different phase changes: sublimation (solid to gas), freezing (liquid to solid), and condensation (gas to liquid).