Question 1: Which is not a clue that a chemical change has happened?
A. new substance is formed
B. temperature change
C. size change
D. gas is produced

Question 2: Which of the following represents chemical change?
A. wood burning
B. ice freezing
C. sugar dissolving
D. wood being sanded

Question 3: Which of the following food changes represents a physical change?
A. toasting bread
B. baking a cake
C. making chocolate milk D. cooking an egg

Question 4: Which of the following is an example a chemical change?
A. water evaporating
B. melting ice
C. food rotting
D. boiling water

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver