Energy
What is the unit for energy?
Joules
What is an example of a neutral substance?
water
Are chemicals reactions reversible or irreversible?
Irreversible
Name the positively charged particle in an atom.
proton
This force pulls objects toward the Earth.
Gravity
Moving energy is also known as?
Kinetic energy
Give the name of an acid found in the lab
Hydrochloric acid
What are two factors that affect the rate of a reaction?
Temperature, surface area, catalyst, concentration
What do we call the centre of the atom?
nucleus
This force slows objects down when they rub against each other.
Friction
Give two examples of renewable energy
wind, solar, biogas, geothermic
What is an alkali?
A base that dissolves in water
Name 2 signs a chemical reaction has taken place
Bubbles, temp change, colour change, new product, smoke, gas, light
What do we call the total number of protons and neutrons in an atom?
Mass number
Gravity, magnetism, and electrostatic force are examples of this type of force.
Non contact force
What is a non-renewable resource?
A resource that will run out
Name 2 types of indicator used to detect acids and bases
Litmus paper, universal indicator
Matter cannot be created or destroyed during a chemical reaction, what is this law called?
Law of conservation of mass
Which particle has a negative charge?
neutron
If two forces acting on an object are equal in size but opposite in direction, the object will not change its motion. What is this called?
Balanced forces
When energy changes from one form to another, the total energy remains the same; this law is called?
The law of conservation of energy
What are the two products produced from neutralisation?
Salt and water
How does temperature affect the rate of a reaction/
Increased temp = faster reaction
How many electrons are in the first shell?
A student has a mass of 50 kg.
The gravitational field strength on Earth is 10 N/kg.
Find the total weight of the student. You must also include the correct unit for weight in your answer.
50 kg X 10 N/Kg = 500 N