J_SCI REVIEW

Tectonic Plates/Soil

A plant that needs well-drained soil would grow best in soil made mostly of

• Silt

• Clay

• Sand

• Humus

Layers of the Earth

Due to extreme pressure, the inner core of Earth is

• Solid

• Liquid

• Gas

• Plasma

Layers of the Earth

Earth is made of different layers that have varying characteristics. Which is the thickest layer?

• The mantle

• The inner core

• The outer core

• The crust

Flowers

When an animal walks by a cocklebur plant, the spines on the seed can attach the seed to the animal’s fur. Which statement best describes how the animal helps the plant?

• The seed is moved to a new location to sprout.

• The seed is consumed by the animal.

• The plant receives more energy.

• The plant need less water.

Flowers

June grew flowering plants in the school garden. What part of this plant takes in carbon dioxide?

• petal

• pistil

• leaf

• roots

Tectonic Plates/Soil

Volcanoes are considered constructive because they

• Deposit lava

• Cause erosion

• Trigger earthquakes

• Release gases

Matter, Heat and Atoms

Jonathan places a pot of water on a stove. As the water boils, how does the state of the water change?

• From a gas to liquid

• From a liquid to gas

• From liquid to solid

• From solid to liquid

Lily explained that she can observe different patterns of stars int he sky at night, depending on the season. What causes the visible pattern of stars in the night sky to change throughout the seasons?

• the rotation of Earth on its axis

• the rotation of the stars on their axes

• the revolution of Earth around the Sun

• the revolution of the Moon around the Earth

Which of the following are the main components of a galaxy?

• dust, moons and gravity

• gas, dust and many stars

• asteroids, comets and planets

• inner planets, outer planets and the Sun

A scientist compares pictures of a rock's appearance. The first picture was taken more than a hundred years ago, and the second was taken this year. In the picture taken this year, the rock appears smaller, and the edges appear smooth. Which process caused the changes in the rock's appearance?

• erosion, because the rock is breaking

• erosion, because sediment is moving

• weathering, because rock is breaking

• weathering, because sediment is moving