Biology
When you breathe in, what is one physiological thing that happens?
Intercostal muscles contract, diaphragm contracts, Lungs expand, Pressure inside chest decreases, Air moves down trachea into lungs to fill space.
What is the name of a chemical reaction that produces heat?
Exothermic reaction.
Describe what is meant by 'balanced forces'.
When forces are equal in size and opposite in direction. This means that the object is not moving.
What is one safety hazard used in an experiment that mixes an acid and a base together.
Chemical spills, glassware breaking, etc.
Define antibodies.
Chemicals produced by while blood cells which kill pathogens.
What is the name of the place where an organism naturally lives?
Habitat.
What are the 3 sub-atomic particles?
Protons, neutrons and electrons.
Write the equation for pressure.
pressure = force/area
Human error.
Define refraction.
a change in the direction of light caused by a change in the speed of light when passing from one medium to another.
What is the vitamin needed for strong bones and teeth?
Vitamin D.
What is the difference between weather and climate?
Climate is the average weather in an area and takes several years to change whereas weather is calculated with a much shorter timespan and can change in a few hours or even a few minutes.
What is the range of colours that can be seen in white light called?
Colour spectrum.
An experiments aim was to discover which type of flower attracted the most insects to it.
The experiment observed 3 types of flowers and recorded how many insects visit the flowers each day and recorded it in a table.
What was the independent and dependent variable in this experiment?
Independent= Types of flower
Dependent= Number of insects.
Define diffusion.
The random movement of particles from an area of high concentration to a lower concentration.
Two muscles that work together with one contracting and the other relaxing are called...?
Antagonistic muscles.
What is the term used to describe a substance that does not dissolve into a solvent?
Insoluble.
List 3 difference shapes of galaxies.
Spiral, elliptical and irregular.
What is a reasonable hypothesis for this experiment?
Japanese summers have increased in temperature every year for 100 years, or any other reasonable answer.
Define bioaccumulation.
gradual increase of a substance in an organisms body, it happens when the substance cannot be broken down inside the body cells.
Name 2 structures that most cells have, but red blood cells do not have.
Nucleus and mitochondria.
What is the product of Sodium and Hydrochloric Acid?
Sodium Chloride and Hydrogen Gas. (as well as a lot of heat!)
What are the 3 factors that affect the strength of an electromagnet?
Sofia is in a car travelling at a speed of 35m/s.
How long will the car take to travel 2100m?
time = distance/speed
= 2100/35
= 60s
Define solubility.
How soluble a substance is.