If blowing air into a whistle causes air to move inside the whistle, then blowing air into what causes air to move inside it? Answer choices: - heat - solid plastic - solid glass - solid rock - whistle - sound - a chime - waves
whistle

If aflashlight requires batteries to produce light, then aflashlight requires what to produce light? Answer choices: - batteries - sunlight - buttons - calcite - coils - adding heat - heat energy - plastic
batteries

If humans breathe with the help of a diaphragm, then what breathes with the help of a diaphragm? Answer choices: - plants - bears - babies - insects - humans - animals - goats - oxygen
humans

If plastic can prevent food from spoiling, then what can help prevent food from spoiling? Answer choices: - Dehydration - Plastics - Metals. - sweating - Cellulose - sugar - Pesticides - Papers
Plastics