A student conducts an investigation about the basic needs of a plant. She gives three plants different amounts of water and the same amount of soil and light. The student measures the growth of the plants. What is the manipulated variable in this investigation?

• the amount of soil

• the amount of light

• the amount of water

• the amount of growth

What state of matter has no definite shape or volume and its molecules are spread far apart and active?

• Gas

• Plasma

• Liquid

• Solid

Caleb picks up a rock that has been warmed by sunlight. What method of transferring heat energy makes Caleb’s hand feel warm?

• Conduction

• Subduction

• Radiation

• Convection

Which of the following is the force of attraction between matter?

• Electricity

• Magnetism

• Gravity

• Momentum

Scientists can find out what an animal may have eaten in the past by studying what evidence?

• Fossil's of the animal's bones

• Fossil's of the animal's tracks

• Fossils of the animal's droppings

• Fossils of the animal's burrows

There are two stars which are different sizes, have the same temperature, and are the same distance from Earth. Which star would be more luminous?

• The bigger star

• The smaller star

• The imaginary star

• The blue star

Which layer of Earth is the thickest and makes up most of Earth's volume?

• Crust

• Mantle

• Outer Core

• Inner Core

What gas makes up most of Earth's atmosphere?

• Hydrogen

• Oxygen

• Carbon

• Nitrogen

What is the result of two continental plates colliding?

• Ocean Trenches

• Mountain building

• Plate tectonics

• Lava

What is an abiotic factor that plants use to grow?

• Bacteria

• Leaves

• Water

• Animals