Which of these is an example of a chemical change?
A. Setting a piece of paper on fire
O
O
B. Melting iron into a liquid
C. Dissolving salt in water
O
O
D. Breaking a piece of plastic in half

Using the periodic table, determine which material is most likely a good conductor

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons