If you see a cow eating grass, you are seeing
a) an autotroph being eaten by a producer
b) a consumer eating a decomposer
c) a producer eating another producer
d) a consumer eating an autotroph

Label a-f based on the table using c for concentrated and d for dilute

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?