Heat Energy and Temperature

Which statement explains why light from the sun can warm up water in a glass?

• light travels very fast

• water reflects light energy

• Water absorbs light energy

• light travels in a straight line

Answer explanation

Water absorbs light energy from the sun, which increases its temperature. This is why sunlight can warm up water in a glass, as opposed to reflecting it or traveling in a straight line.

Tags

NGSS.MS-PS4-2

Which of the following is a natural source of heat?

• hair dryer

• volcano

• hot tub

• freezer

Answer explanation

A volcano is a natural source of heat, as it produces magma and lava from the Earth's interior. In contrast, a hair dryer, hot tub, and freezer are man-made devices that do not originate heat naturally.

Which list contains all sources of heat?

• Sun, unlit candle, lighter

• Freezer, temperature, sun

• Eating, friction, lighter

• Temperature, sun, toaster

Answer explanation

The correct choice is 'eating, Friction, lighter' as all these sources generate heat. Eating involves metabolic processes, friction generates heat through movement, and a lighter produces flame, all contributing to heat.

Sunlight carries light and ____ from the sun to the Earth.

• sunlight

• energy

• heat energy

Answer explanation

Sunlight carries light and heat energy from the sun to the Earth. While 'energy' is a broad term, 'heat energy' specifically refers to the thermal energy transferred, making it the correct choice.

Tags

NGSS.MS-ESS2-4

Metal gets hot easily, so it absorbs heat _____.

• easily

• slowly

Answer explanation

Metal gets hot easily because it has a high thermal conductivity, allowing it to absorb heat easily. Therefore, the correct choice is 'easily'.

Tags

NGSS.MS-PS3-4

Shade protects and _______ relief from the Sun's heat.

• energy

• provides

• supports

• needs

Answer explanation

The correct choice is 'provides' because it fits the context of the sentence, indicating that shade not only protects but also offers relief from the Sun's heat.

Tags

NGSS.MS-LS2-3

True or False?

The sun affects all materials the same way.

• False

• True

Answer explanation

False is correct because the sun affects materials differently based on their properties. For example, metals may heat up quickly, while plastics can degrade or change color when exposed to sunlight.

Tags

NGSS.MS-ESS2-4

True or False?

Dark colors absorb heat from sunlight more easily than light colors.

• True

• False

Answer explanation

True. Dark colors absorb more heat from sunlight than light colors because they have lower albedo, meaning they reflect less light and absorb more energy.

True or False?

Water absorbs heat slowly.

• True

• False

Answer explanation

True. Water has a high specific heat capacity, meaning it can absorb a lot of heat without a significant increase in temperature, which makes it slow to heat up.

Tags

NGSS.MS-PS1-4

True or False.

Shade protects and provides relief from the Sun's heat.

• False

• True

Answer explanation

True. Shade indeed protects and provides relief from the Sun's heat by blocking direct sunlight, making the environment cooler and more comfortable.