A
A push or pull on an object.
Force
A force that pulls objects toward the Earth.
Gravity
The amount of matter in an object.
Mass
The force of gravity on an object.
Weight
Which part of the plant makes food?
Leaf
How fast something is moving.
Speed
Which planet is known as the Red Planet?
Mars
How long something takes.
Time
What is the unit of force.
Newton
Animals that eat only plants are called:
Herbivores
What is the process by which plants make food called?
Photosynthesis
Which part of the human body controls all activities?
Brain
Which gas do plants release during photosynthesis?
Oxygen
What do we call a group of stars that forms a pattern?
Constellation
Which process changes water into vapor?
Evaporation
What is the function of chlorophyll in plants?
It helps absorb sunlight for photosynthesis.
This device is used to measure temperature.
thermometer
Why do we see lightning before hearing thunder?
Light travels faster than sound
What do we call animals that eat both plants and meat?
Omnivores
What is the main gas found in the air we breathe?
Nitrogen
Why is the sky blue during the day?
Because air scatters blue light from the Sun more than other colors.
What causes day and night on Earth?
The rotation of the Earth on its axis
Why does ice float on water?
Ice is less dense than water.
What causes seasons on Earth?
The tilt of the Earth’s axis as it orbits the Sun.
What causes rainbows to appear after rain?
Sunlight is bent and split into colors by water droplets (refraction and dispersion).