5th Grade Science Review

Why do stars appear to be different sizes?

• Things look smaller when they are closer.

• Things look larger when they are far away.

• Things look smaller when they are far away.

• Things look larger at different times of the day.

What do the Sun and other stars have in common?

• Stars are made of hot, glowing gases.

• Stars all have the same brightness.

• Stars can only be seen at night.

• Stars are all the same size.

Which of these objects found within the Solar System revolves around a planet?

• an asteroid

• a star

• a comet

• a moon

Which of the following best describes a difference between comets and asteroids?

• Comets orbit planets, and most asteroids orbit the Sun.

• Comets are hot balls of gas, and asteroids are made mostly of ice.

• Comets are made mostly of ice, and asteroids are made mostly of rocks.

• Comets orbit the Sun between Mars and Jupiter, and asteroids form patterns in the sky.

After Earth completes one full rotation on its axis, how much time has passed?

• one 24-hour day

• one 7-day week

• one full month

• one full year

What are the properties of obsidian?

• black, shiny, glassy, curved surfaces

• gray, full of holes, lightweight

• molten rock inside the Earth hardened

• lava from erupting volcanoes cooled and formed hard rocks

How did obsidian and pumice form?

• Molten rock inside the Earth hardened

• Lava from erupting volcanoes cooled and formed hard rocks

• Rocks inside the Earth were changed under heat and pressure

• Tiny particles of sand and shells were stuck together over time

Which statement best describes an example of a non-renewable resource?

• Solar energy

• Wind energy

• Energy from fossil fuels

• Energy from flowing water

What would be the main cause of the rocks becoming rounded?

• Sand blowing against the rocks

• Rain blowing down on the rocks

• Ice forming in cracks in the rocks

• Plant roots breaking off pieces of the rocks

How do plants most commonly break large rocks into smaller pieces?

• Plant leaves insulate surrounding rocks from extreme temperatures.

• Seeds from plants fall onto rocks and release acidic compounds.

• Stems of plants surround and squeeze rocks.

• Plant roots grow into cracks in rocks.