Space
Which planet is known as the Red Planet?
Mars
What force pulls everything down toward Earth?
gravity
What do we call a force that moves an object away from you or brings it closer?
What are the three main states of matter?
gas, liquid, solid
What is the largest living organism?
a. blue whale
b. elephant
c. fungus
d. megalodon
fungus
What do we call the path a planet takes around the Sun?
An orbit
What is the name of the force that pushes up on an aircraft to keep it in the air?
lift
This force slows things down when two surfaces rub together.
friction
What do we call it when a solid turns into a liquid?
melting
What natural event is hotter than the sun?
lightning
What tool do scientists use to observe faraway objects in space?
telescope
What part of an airplane helps it move forward through the air?
engine / propeller / thrust system
What force pulls everything down toward the centre of the Earth?
gravity
This is how we describe matter using senses like touch, sight, or smell (like texture, color, or hardness).
physical properties
Why do your ears "pop" when you go up a mountain or fly in a plane?
Because the air pressure around you changes faster than the pressure inside your ears.
This object in space can perform specific tasks, like communication or research.
What are the four forces of flight?
lift, weight, thrust, and drag
What kind of force can attract or repel objects without touching them, like in magnets?
magnetic force
What are the tiny things that all matter is made of?
particles
What is the process by which plants make their own food?
photosynthesis
Why don’t we feel the Earth spinning, even though it rotates at about 1,600 km/h?
because everything on Earth, including the air, is moving with it at the same constant speed, so we don’t feel the motion
How do hot air balloons rise into the air if they don’t have wings or engines?
Hot air inside the balloon is lighter than the cooler air outside, so the balloon rises due to buoyant force.
If two equal forces act on an object in opposite directions, what do we call the forces?
balanced forces
What kind of change happens when a new substance is formed and it can't easily go back?
chemical change
Which planet was once considered a planet but was later reclassified as a dwarf planet?
pluto