Science Exam Revision Flashcards
what’s the word equation for photosynthesis
Water + Carbon Dioxide—–> oxygen + glucose
Where does photosynthesis happen?
In the chlorophyll of the chloroplasts in a plant cell
How does carbon dioxide enter and oxygen leave the plant?
Through the stomata
Does respiration happen in all living things all the time and what does it make?
Yes and it makes energy
What’s the word equation for respiration?
Glucose + oxygen—–> carbon dioxide + water
Where does gas exchange happen?
In the lungs
What adaptations do polar bears have?
Lots of fur for insulation
What are the causes of variation
Genetic and environmental
What is continuous variation
A range of values across a population : height
What is discontinuous variation?
Groups or categories : blood group
What process occurs evolution
Natural selection
In the periodic table are groups vertical or horizontal
Vertical
In the periodic table do periods go vertical or horizontal
Horizontal
What same properties do groups have in the periodic table?
Appearance, melting point, reactions with other elements
What do chemical reactions combine to make a new product
Reactants
What does burning always make?
Carbon dioxide and water
What is thermal decomposition
The breaking down of a compound using heat
Name a common acid
Vinegar
Name a common alkali
Baking soda
Names use for neutralisation
Alkaline digestion pills to.break down acid in the stomach
Why are plants producers?
Because they make their own food by photosynthesis
What does continuous variation normally show and what is it called?
A bell shaped curve called normal distribution
What’s the test for carbon dioxide gas?
The limewater turns cloudy
What is an alkali
A base that is soluble in water
