*Question*
You are presented with the question "what does a firecracker convert chemical energy into?" and the following answer choices: - Light - Energy. - fire - waves - heat - energy - gas - LEDs Now knowing that afirecracker converts chemical energy into sound and particularly interesting waves are sound waves , choose the best answer.
**Answer**
waves

*Question*
You are presented with the question "What are just as nutritious as animals without backbones?" and the following answer choices: - Organic compounds - bioaerosols - Most plants - dinosaurs - skunks - birds - animals with backbones - microorganisms Now knowing that invertebrates are animals that lack a vertebral column, or backbone and invertebrates are just as nutritious as vertebrates, choose the best answer.
**Answer**
animals with backbones

*Question*
You are presented with the question "What do prisms do to light?" and the following answer choices: - focusing a lens - Refract it - Reflect it - protect them - Absorb it - observe it - It expands - Diffraction Now knowing that glass cause refraction of light and prisms are round pieces of glass, choose the best answer.
**Answer**
Refract it

*Question*
You are presented with the question "What can be used to generate heat?" and the following answer choices: - wind - desire - knobs - gas - Coal - fire - rain - oil Now knowing that astove is used for cooking by generating heat and for cooking, gas or wood stoves can be used, choose the best answer.
**Answer**
gas