*Question*
If frogs, toads, and salamanders have sense organs to smell and taste chemicals, then what can frogs, toads and salamanders use to smell and taste chemicals? Answer choices: - sense organs - Chemical energy - matter vibrating - larynx - Organic compounds - ocular organs - gills - harmful substances
**Answer**
sense organs

*Question*
If car engines convert gasoline into friction, then car engines convert gasoline into what? Answer choices: - light - Energy. - heat - fuel - color - electricity - friction - sound
**Answer**
friction

*Question*
If male hormones stimulated the reproductive organs to develop into male organs, then what stimulates the reproductive system to form male organs in growth? Answer choices: - Chemical energy - barnacles - Electrical energy - a doorbell - sensory neurons - peachleaf willow - Veins and arteries. - male hormones
**Answer**
male hormones

*Question*
If darkness has a negative impact on plant growth, then what has a negative impact on plant growth? Answer choices: - disease - Pollution - nutrients - care - competition - darkness - light - Pesticides
**Answer**
darkness