Chemistry
What is an atom?
The smallest unit of matter
What is energy?
The ability to do work
The ability to make things move
What is a reactant?
A substance that starts a chemical reaction.
What is the basic unit of life?
A cell
How many cards in a deck of cards?
52
What are the three states of matter?
solid, liquid and gas
What are the 2 main forms of energy?
Potential and Kinetic
Which indicator is used to test pH?
Litmus or universal indicator
Name one difference between plant and animal cells.
Plant cells have a cell wall/chloroplasts; animal cells do not.
If you added up all the numbers on a dice, what is the answer?
21
What is the state change called when a liquid changes to a solid?
Freezing
What are 2 types of potential energy?
Gravitational, chemical, elastic, nuclear
What is formed when an acid reacts with a alkali?
salt and water
What is the function of the mitochondria in a cell?
To produce energy
What is the most abundant gas in Earth's atmosphere?
Nitrogen
Give 3 reasons you know a chemical change has occurred.
change in colour, release of light, release of gas, smell, change in temp.
What are 4 types of kinetic energy?
heat, light, sound, electrical
What does the atomic number tell you?
The number of protons in an atom.
Which system in the human body is responsible for transporting oxygen and nutrients to cells?
Circulatory system
Which planet in our solar system has the most moons?
Saturn
Name the process that occurs when particles gradually mix until the concentration is even
Diffusion
What is an energy transformation? Give an example
when energy is changed from one type of energy into another
eg - electrical to light
State one reason why alloys are harder than pure metals.
Added atoms distort the layers, preventing them from sliding.
Name 5 different systems of the human body
digestive, reproductive, circulatory, respiratory, skeletal, nervous, lymphatic, integumentary, excretory, muscular
What Australian animal is the twenty cent coin?
Platypus