Astronomy Test

What is the definition of CONVECTION

• When heat transfers through waves.
• When heat transfers from objects that are touching.
• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
• Heat traveling from the sun

How are the gases in Earth's atmosphere like a blanket?

• They hold in heat and keep temperatures stable
• They are colorful and soft
• They hold Earth's water and prevent it from escaping
• They sometimes wrinkle and fold to cause tornadoes

How does the ozone (O₃) layer in the Earth's atmosphere help make life possible?

• It gives animals more oxygen to breathe
• It speeds up the water cycle
• It blocks harmful UV rays from the Sun
• It protects us from electrically-charged particles in solar winds

How does the Earth's magnetic field help make life possible?

• It gives the Earth its gravity
• It makes the Earth rotate at the right speed
• It protects us from harmful UV rays from the Sun
• It blocks electrically-charged particles in solar winds

which season for the northern hemisphere is shown at position 1?

• summer
• winter
• fall
• spring

What is the season for the northern hemisphere at position 2?

• winter
• summer
• spring
• fall

What heat transfer method is used to get the heat energy from the Sun to the Earth?

• conduction
• convection
• radiation

What causes the seasons to change?

• The warming and cooling of Earth's core.
• The distance from the sun.
• Earth's tilt in relation to the sun.
• Earth's rotation on its axis.

The movement of one object around another is

• rotation.
• revolution.
• nutation.
• inertia.

The spinning of Earth on its axis is called

• rotation.
• revolution.
• orbit.
• inertia.