What does the blood coming from the lungs contain?
Oxygen.
What does bpm stand for?
beats per minute
What does the blood travelling to the lungs contain?
Carbon dioxide.
Use the particle model to explain dissolving.
When a solute dissolves, the particles of the solute move between the particles of the solvent.
Draw the electrical symbol of a buzzer.
What do you predict would happen to your pulse if you pedalled your bike faster?
It would get faster.
When we breathe in, describe the path the oxygen takes.
nose / mouth --> windpipe --> lungs --> blood
Your heart pumps blood through the body. This process is called _________.
circulation.
What does the stomach contain to defend against diseases?
Acid.
Which body system is used for breathing?
The respiratory system.
Name four living things that cause disease.
Parasites, viruses, bacteria and fungi.
Draw the electrical symbol of two 1.5V cells.
Explain what happens to the light as it enters the glass block. What is this called?
As the light enters the block, it gets bent. It then travels in a straight line until it exits the block and bends again. This is called refraction.
What do we call substances that do not conduct electricity?
Electrical insulators.
Draw the electrical symbol of a 3V battery.
Why does Neptune have the longest orbit?
Because it is the furthest planet from the Sun.
Explain why a physical change is reversible.
This is because a physical change alters how a substance looks and feels. It does not change into a new substance.
What are two differences between boiling and evaporation?
Boiling: Happens at a certain temperature; Happens throughout the liquid Evaporation: Happens at any temperature; happens at the surface of the liquid.
What does the heart pump through the body?
Blood.
Name the four parts of the respiratory system.
nose, windpipe, lungs and diaphragm.
What are the two parts of a solution?
The solute and the solvent.
The left side of the heart pumps blood that contains __________.
oxygen
What are two ways we can prevent insect bites?
Sleep under bed nets, wear long sleeves and trousers, keep doors and windows closed at night, use insect repellent, burn mosquito coils to keep them away.
Heat is a type of energy transfer. What is this type of energy transfer called?
Conduction.