8. Sınıf İngilizce Science Testleri

Doğru cevap: D

Sublimation is the change from solid to gas without the liquid stage. Condensation is gas to liquid, melting is solid to liquid, and evaporation is liquid to gas.

1. Çözüm: Sublimation is the change from solid to gas without the liquid stage. Condensation is gas to liquid, melting is solid to liquid, and evaporation is liquid to gas.

Doğru cevap: A

Higher temperature means higher average kinetic energy, so particles move faster. Water boils at 100°C (at sea level), so it did not have to boil. Heating does not increase mass.

1. Çözüm: Higher temperature means higher average kinetic energy, so particles move faster. Water boils at 100°C (at sea level), so it did not have to boil. Heating does not increase mass.

Doğru cevap: B

Both spoons are at the same room temperature, but metal is a better conductor. It transfers heat from your hand more quickly, so it feels colder. Wood is a poor conductor, so the heat transfer is slower.

1. Çözüm: Both spoons are at the same room temperature, but metal is a better conductor. It transfers heat from your hand more quickly, so it feels colder. Wood is a poor conductor, so the heat transfer is slower.

Doğru cevap: C

Iron is magnetic but sand is not, so a magnet separates them efficiently. Sand does not dissolve in water, so B is incorrect. Melting iron is unnecessary and impractical for a simple separation.

1. Çözüm: Iron is magnetic but sand is not, so a magnet separates them efficiently. Sand does not dissolve in water, so B is incorrect. Melting iron is unnecessary and impractical for a simple separation.

Doğru cevap: D

A controlled experiment changes only one variable. Here, fertilizer is the only difference between the two identical groups. That makes the results reliable.

1. Çözüm: A controlled experiment changes only one variable. Here, fertilizer is the only difference between the two identical groups. That makes the results reliable.

Doğru cevap: A

During boiling, temperature remains constant at the boiling point. The energy goes into changing liquid into gas. Therefore the plateau at 100°C indicates boiling.

1. Çözüm: During boiling, temperature remains constant at the boiling point. The energy goes into changing liquid into gas. Therefore the plateau at 100°C indicates boiling.

Doğru cevap: B

Renewable sources are naturally replenished on a short time scale. Wind keeps being produced by atmospheric processes. Coal and natural gas take millions of years to form.

1. Çözüm: Renewable sources are naturally replenished on a short time scale. Wind keeps being produced by atmospheric processes. Coal and natural gas take millions of years to form.

Doğru cevap: C

A strong claim needs long-term, global data rather than local or short-term events. Option B uses decades of measurements and compares two trends. That best supports the relationship.

1. Çözüm: A strong claim needs long-term, global data rather than local or short-term events. Option B uses decades of measurements and compares two trends. That best supports the relationship.

Doğru cevap: D

Bubbling indicates gas formation, which is evidence of a chemical change. Vinegar and baking soda react to produce carbon dioxide gas. Therefore it is a chemical reaction.

1. Çözüm: Bubbling indicates gas formation, which is evidence of a chemical change. Vinegar and baking soda react to produce carbon dioxide gas. Therefore it is a chemical reaction.

Doğru cevap: A

Wind energy is renewable because it is naturally replenished. Coal, natural gas, and oil are fossil fuels and non-renewable.

1. Çözüm: Wind energy is renewable because it is naturally replenished. Coal, natural gas, and oil are fossil fuels and non-renewable.