Life Science
What is the process by which plants turn sunlight into energy?
Photosynthesis
Which planet is closest to the Sun?
Mercury
What force keeps us firmly planted on the ground?
Gravity
What is the fastest land animal in the world?
The cheetah (over 75 mph)
If an object is not moving, are the forces on it balanced or unbalanced?
Balanced
Which organ acts as the "control center" or "brain" of a cell?
The nucleus
What percentage of the Earth is covered in water?
about 71%
What is the chemical formula for water
H2O
What do plants help stop?
Soil erosion
What do you call the force that slows down moving objects when surfaces rub together?
Friction
What do you call the part of a tree that grows underground to absorb water?
Roots
What is the farthest planet from the Sun?
Neptune
What are the three main states of matter?
Solid, Liquid, Gas
What is the process called when liquid turns into gas?
Evaporation.
What is the difference between mass and weight?
Mass is the amount of matter in an object, while weight is the force of gravity on that object.
True or False: Birds have teeth.
A: False (they have bills or beaks)
How old do scientists believe the Earth is?
4.54 Billion years old
What device is used to measure temperature?
A thermometer
What is the process called when gas turns into liquid?
Condensation
Does a heavier object always fall faster than a lighter one?
No, gravity accelerates them at the same rate
What is known as the "powerhouse" of the cell?
The mitochondria
How many Earths can fit inside the Sun?
What is the speed of light?
How long have dragonflies been on Earth?
They have been around for over 300 million years.
What is the definition of motion?
A change in position