Show:
Chemistry
Electricity
Biology
Space
Mystery
100
In this state of matter, atoms move freely in all directions.
A gas
100
Which of these materials would let electricity flow through it? rubber plastic cardboard aluminum foil
Aluminum foil
100
The building blocks of all living things are called ______.
cells
100
These are balls of gas, burning billions of miles away. (Lion King reference!)
Stars
100
This type of energy is used to power many devices and appliances.
Electrical
200
The building blocks of all matter are...
atoms
200
What do you call an object that allows electricity to run through it easily?
A conductor
200
This surrounds a cell, keeping out unwanted materials and allowing good materials to pass through.
Cell membrane
200
Life on Earth would not be able to exist without the heat and light from the ____.
sun
200
70% of the human body is made up of _____.
water
300
Boiling water is an example of a __________ change. (Physical or chemical)
Physical
300
When talking about "charges", there are three kinds.
Positive, negative, neutral
300
The control center of a cell that directs all the functions.
Nucleus
300
There are this many planets in our solar system. They are...
Eight Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
300
This celestial body used to be considered a planet, but is not anymore.
Pluto
400
A solid, such as ice, will change its state into a liquid if...
the temperature is raised
400
The path that electricity follows, often used in electronics, is known as an electric ______.
circuit
400
A group of tissues that function together to do a certain job is called an ______.
organ
400
This structure orbits the Earth. Astronauts live and work in it, sometimes for long stretches of time.
The International Space Station
400
A compound is when two substances combine to form a new substance. A mixture is when...
two substances are mixed, but remain separate.
500
This particle has a positive charge, and is found in the nucleus of an atom.
A proton
500
This particle is responsible for electricity - the name of the particle was chosen based on "electric".
Electron
500
The process used by cells and organisms to carry on their species - this may be sexual or asexual.
Reproduction
500
There is nothing in the emptiness of space, not even air. This is called a ______.
vacuum
500
These are the four states of matter.
Solid, liquid, gas, plasma