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🔬 Science, Years 9 and 10

Years 9 to 10 · Read up first

10 questions. Get 8 right to earn 10 minutes. All 10 right = +5 bonus. They start easy and get harder as you go, so treat the first few as a warm-up. Every one you miss comes back with the answer and why.

1. Which particle in an atom has a positive charge?

NucleusElectronNeutronProton

2. Which of these is part of the electromagnetic spectrum?

Visible lightSound wavesOcean wavesSeismic waves

3. What raw materials does a plant need to carry out photosynthesis?

Only sunlightOxygen and glucoseCarbon dioxide, water and light energyNitrogen and carbon dioxide

4. Which part of a cell contains most of its genetic material (DNA)?

The cytoplasmThe mitochondriaThe nucleusThe cell membrane

5. Why must a chemical equation be balanced?

It changes the products formedThe number of atoms of each element must be the same on both sidesIt makes the equation look neaterIt is only needed for equations with gases

6. A 2 kg object is pushed with a force of 10 N. Using F = ma, what is its acceleration?

0.2 m/s^220 m/s^212 m/s^25 m/s^2

7. Rows in the periodic table are called what?

PeriodsBlocksFamiliesGroups

8. In a decomposition reaction, what generally happens?

A solid forms from two liquidsOne element replaces another in a compoundTwo substances combine to make one new substanceOne larger compound breaks down into two or more simpler substances

9. Where does the variation that natural selection acts on originally come from?

Differences in DNA between individuals, including mutationsAnimals deciding to changeIt does not come from anywhere, all individuals start identicalThe environment directly rewriting an animal's DNA during its life

10. A population of insects is exposed to a pesticide. Over many generations, the insects become resistant to it. What is the best explanation using natural selection?

The pesticide directly changed every insect's DNA to make them resistantInsects that happened to already have resistance survived and reproduced more, passing resistance onResistance appeared by chance in every insect at the same timeThe insects deliberately evolved resistance because they needed it

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