Which description fits the gas sample in this particle model?

Which pair gives the approximate percentages of nitrogen and oxygen in dry air?

Which component of air do our bodies use during respiration to release energy from food?

A pechay plant uses sunlight to make food. Which gas does it take in for this process?

What is the gaseous form of water present in the air called?

What is the layer of gases surrounding Earth called?

An upside-down glass keeps its tissue dry when lowered straight into water. What happens if it is tilted enough for bubbles to escape?

Bubbles escape when the teacher opens a capped, apparently empty bottle underwater. What does this observation show?

Identical candles are covered by equal-width glasses of different heights. Why does the flame under the shorter glass usually go out first?

How does the needed gas from air help a candle stay lit?

Which component of air is commonly released as the fire-smothering gas in portable fire extinguishers?

How can a large increase in atmospheric carbon dioxide affect Earth's temperature?

Why is nitrogen put into some sealed snack bags instead of ordinary air?

Which gas is commonly used to fill traditional incandescent light bulbs?

Which gas found in small amounts in air is commonly used to fill balloons that float upward?

Which component of air is used in glowing gas-filled tubes for advertising signs?

Why is clean air usually difficult to notice using only our eyes and nose?

A family stops burning plastic wrappers but burns fallen leaves instead. Which statement about the air pollution is correct?

Which statement about planets and their surrounding gases is correct?

Liza uses 100 counters to model dry air. About how many should represent gases other than nitrogen and oxygen?