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A cell has a nucleus, mitochondria and cell membrane, but no cell wall. What type of cell is it?
Animal cell
Sodium hydroxide reacts with hydrochloric acid. What products are formed in this neutralization?
Salt (sodium chloride) and water
A 5 kg bag is on Earth. Gravity on Earth is 10 N/kg. What is the weight of the bag?
50 N
Sea water is heated until it boils. The steam is cooled back into liquid in another container.
Distillation
What does this symbol mean?
Health hazard
Boiling sea water → steam → then cool back to liquid = what method?
Simple distillation
A box is pushed with 40N forward but friction is 40N backward → what happens to the box?
Forces are balanced so no acceleration
Blue litmus turns red in a solution → what does that show?
Solution is acidic
Two liquids boil at 60°C and 110°C. What method is used to separate them?
Distillation
Why do plant cells have chloroplasts but animal cells do not?
Only plants do photosynthesis
Why do metal spoons fell colder than wooden spoons even if both are in the same room?
Because metal takes heat away from your hand faster than wood does.
Bonus Question: Why do your fingers wrinkle after staying in water for a long time?
Because your nervous system makes the skin wrinkle to improve grip in wet conditions.
