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What causes day and night?
Earth's rotation
What line divides the Earth in half?
Equator
What instrument views tiny objects?
Microscope
What are the three states of matter?
Solid, Liquid, and Gas
What is a liquid turning into a gas called?
Evaporation
What is the smallest unit of life?
Cell
Which body system fights diseases?
Immune system
What do you call animals with backbones?
Vertebrates
What gas do plants absorb?
Carbon Dioxide
What is the first step of the scientific method?
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What causes ocean tides?
The Moon's gravity
What is the study of fossils?
Paleontology
What is the largest bone in the human body?
Femur
What process lets plants make food using sunlight?
Photosynthesis
What creates a rainbow?
Sunlight through water droplets
Which atmospheric layer contains the ozone layer?
Stratosphere
What is Earth's only natural satellite?
The Moon
What are the four chambers of the heart?
right atrium, right ventricle, left atrium, left ventricle
What is light bending called?
Refraction
What is a controlled experiment?
Only one variable changes
Name the Earth's four layers.
Crust, mantle, outer core, inner core
Which planet has the Great Red Spot?
Jupiter
What brain part controls balance?
Cerebellum
What energy does motion create?
Kinetic energy
Which metal is liquid at room temperature?
Mercury