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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 of these is part of the electromagnetic spectrum?

Visible lightSound wavesSeismic wavesOcean waves

2. What is the basic unit of life that makes up all living things?

The tissueThe cellThe atomThe organ

3. Why must a chemical equation be balanced?

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

4. Newton's second law is often written as F = ma. What does the 'a' stand for?

AltitudeAverage speedAreaAcceleration

5. In science, what does it mean to do 'work' on an object?

To hold the object still against gravityTo heat the object upTo think hard about a problemTo apply a force that moves the object through a distance

6. In a decomposition reaction, what generally happens?

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

7. Rows in the periodic table are called what?

BlocksPeriodsGroupsFamilies

8. What is mitosis?

The joining of a sperm and egg cellThe movement of substances across a cell membraneThe process of a cell dyingCell division that produces two identical daughter cells for growth and repair

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 student measures 9 V across a resistor and 3 A of current through it, but says the resistance is 27 ohm. What did they get wrong?

They multiplied V by I instead of dividing V by IThey used the wrong units for voltageResistance cannot be calculated from these values27 ohm is actually correct

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