Use the Science Seminar Evidence Cards to explain why you think the other claim (Claim 1 or Claim 3) is not as strong.

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays