Respiratory & Circulatory System
What happens during gas exchange and where does it take place?
Carbon dioxide is exchanged for oxygen, this happens in the alveoli
What reproductive cells are produced in the male and female reproductive systems?
Male: Sperm
Female: Egg
What are pathogens?
Viruses and living things that cause diseases
What do several food chains form?
A food web
Define "matter"
Anything that takes up space and has mass
Which is connected to the trachea, bronchioles or bronchus?
Bronchus
What's another name for "sperm"?
Spermatozoa
Which pathogen is neither a plant nor animal?
Fungi
What do food chains show?
The transfer of energy from one living thing to another
When does a change of state happen?
When the substance gains or loses heat
When we exhale, what happens to our rib cage and diaphragm?
Rib cage: Moves downwards and inwards
Diaphragm: Relax (moves upwards)
What is the uterus and its function?
It's a muscular organ and is where the baby develops
What is the "passing of pathogens from one host to another" called?
Transmission
Why are plants called "producers"?
They make their own food using sunlight
What do you call materials that cannot conduct heat?
Thermal insulators
What do the veins carry?
Blood poor in oxygen
When does puberty usually begin?
Ages 8-14
Define "vectors"
Insects that can carry pathogens from one host to another
What do arrows in a food chain represent?
Energy flow
How are boiling and evaporation different?
Boiling takes place when a liquid reached its boiling point.
Evaporation can happen at any temperature
Which side of the heart is oxygen-rich blood located?
Left sided
What physical change(s) happens to both girls and boys?
1. Growth spurt
2. Body shape changes
3. Skin gets oily/sweating increases
4. Growth of body hair
How does the stomach kill pathogens?
It secretes/releases stomach acid
What is it called when toxic substances build up in living things?
Bioaccumulation
Why does increasing temperature increase the rate of dissolving?
- Solvent particles will have more energy
- This makes them move faster
- They can easily break up solute particles