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

The cellThe atomThe organThe tissue

3. Which of these is a group in the periodic table known for being very reactive metals?

Group 8 (or 18), the noble gasesGroup 7 (or 17), the halogensThe transition metalsGroup 1, the alkali metals

4. What is voltage a measure of?

The heat produced in a wireThe number of electrons in a circuitThe speed the electrons travel atThe energy given to each unit of charge by the power source

5. Which type of electromagnetic radiation is used in microwave ovens to cook food?

MicrowavesUltravioletRadio wavesGamma rays

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

20 m/s^25 m/s^20.2 m/s^212 m/s^2

7. Balance this equation: __ H2 + O2 -> __ H2O

H2 + 2 O2 -> 2 H2O2 H2 + O2 -> H2OH2 + O2 -> H2O2 H2 + O2 -> 2 H2O

8. Which equation represents photosynthesis?

C6H12O6 -> 6CO2 + 6H2O6O2 + 6H2O -> C6H12O6 + 6CO2C6H12O6 + 6O2 -> 6CO2 + 6H2O6CO2 + 6H2O -> C6H12O6 + 6O2

9. A rocket pushes hot gas downward and out of its engine. According to Newton's third law, why does the rocket move upward?

The gas pushes back on the rocket with an equal and opposite forceHot gas is lighter than the rocket, so the rocket floatsThe rocket loses mass and that makes it riseThe rocket is being pulled up by the atmosphere

10. Two parents are both Aa for a trait where A is dominant. What is the probability their child is aa and shows the recessive trait?

1 in 41 in 23 in 41 in 8

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