Isla and William learned that the continents have a layer of solid rock, the crust, covering the hot stuff in the mantle.

During a geography class, Kai learned that the continental crust is mostly covered with thin layers of soil.

Mason tried to break a large rock into smaller pieces using a sledge hammer, but he found it impossible.

Even though Oliver sees soil as just dirt in his backyard, it is really made up of many different kinds of things.

During a field trip, Priya noticed how weathering is caused in nature by such things as wind, water, and temperature changes that break the rock into ever smaller pieces.

Daniel learned in science class that without water there can be no life.

During a science class, Abigail learned that we drink only a tiny amount of water that is treated for our use.

Avery learned that 60% of the Earth's surface is covered by water during a geography class.

During a school field trip to the planetarium, Charlotte learned about the different layers of the Sun. What is the bright surface of the Sun called?

During a science class, Charlotte learned that water is the only substance on earth that naturally exists in all 3 forms - solid (ice), liquid (water) and gas (steam).

During a science class, Aria asked her teacher, "What is the Sun?"

During a science project, Henry learned about the Sun's temperature. He was curious and asked his teacher, "What is the surface temperature of the Sun?"

Evelyn is studying the solar system in her science class. She learns that the Sun plays a crucial role in the solar system. What is the Sun's role in our solar system?

Ava and Mia were discussing what would happen to Earth if the Sun suddenly disappeared.

Ava is studying the Earth's atmosphere in her science class. She learns about the protective layers that shield our planet from harmful solar radiation. What protects Earth from this radiation?

During a science class, Olivia asked her teacher, "What is the Sun's corona?"

During a science project, Anika learned about the different layers of the sun. She discovered that the center of the sun is extremely hot.

Noah looked up at the sky during a sunny day and noticed a huge flame-like structure coming out of the sun.

Which of the following is the main function of the skeletal system?

What type of joint allows for back-and-forth movement like in your elbow?

Which of these bones protects your brain?

What are voluntary muscles?

What happens when muscles work in pairs?

Which of these bones protects your heart and lungs?

What do we call muscles that work without our conscious control?

What connects bone to bone?

Protects the eyes

Which of these is NOT a natural source of water?

It is the cheapest and most practical means of providing water to small communities.

It is contains 3.5 percent of salts in solution.

It contains dissolved and suspended impurities of all kinds.

It is the only start in a solar system.

During the solar eclipse, the ______becomes visible to earth.

It is a dark patch on the suns surface.

Viewed as a red rim around the sun.

Earth without light and heat, life on earth would be impossible.

Earth without the heat, our earth would be a frozen sphere of hard rock.

We can live in a cold, cold place,