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WorksheetsUnit 2 Changes in Matter
Total questions: 23
Worksheet time: 12mins
Water and 70% Isopropyl Alcohol, both clear liquids, are mixed together. Observations are made by Mr. Watts and he noticed no change in color or temperature. This is evidence of?
Physical Change
Chemical Change
No Change
Which of the following is an example of a physical change?
Burning rocket fuel
Vinegar mixes with iron and heat is produced
Cutting paper
Digesting food
Liquid A is mixed with Liquid B. A thermometer is placed within the liquid and a decrease in temperature is observed. This is an example of?
A physical reaction
A chemical reaction
Change in state of matter
No change
Which of the following is a characteristic of a chemical change?
Melting a substance into a liquid
Precipitate is formed
Unexpected color change
Both precipitate and color change
The radiant energy plants need for photosynthesis comes from the?
Moon
Ocean
Gravity
Sun
In the process of photosynthesis, plants produce and release a gas called?
Nitrogen
Oxygen
Carbon Dioxide
Hydrogen
The process that plants use to produce their own food using light energy from the Sun.
Homeostasis
Cellular Respiration
Mitosis
Photosynthesis
Mr. McKelroy cooks a mean brisket. Mrs. Holloman and Mr. Watts use the energy from the brisket to move and stay alive. Which of the following is the correct conversion of energy from brisket to movement?
Chemical to mechanical
Thermal to mechancial
Mechanical to chemical
Chemical to thermal
When plants use sunlight to make their food (glucose), this is which of the following energy conversions?
Mechanical to thermal
Thermal to radiant
Radiant to mechanical
Radiant to chemical
Dogs are able to chase mailmen due to which of the following energy conversions?
Radiant to mechanical
Mechanical to chemical
Chemical to mechanical
Thermal to radiant
Which of the following is true of chemical energy consumed by organisms?
It is transformed into other various forms of energy
It is destroyed in the stomach
Zero energy is needed to survive
All energy stays as chemical energy
The energy plants convert in photosynthesis is stored in which molecule?
Carbon dioxide
Nitrogen
Water
Glucose (sugar)
Which is the correct energy conversion in the process of photosynthesis?
Chemical to mechanical
Radiant to chemical
Chemical to radiant
Thermal to chemical
What is the primary source of energy for photosynthesis?
Water
Carbon Dioxide
Glucose
The Sun
Which of the following is NOT a chemical change?
Two liquids combined produce a gas
Sugar dissolving into water and can be separated
A precipitate, yellow solid, is formed from mixing lead nitrate and potassium iodide
Heat and rust forming from vinegar and steel wool
Which of the following is true of physical changes?
No new substance is created
Physical properties, such as state of matter, may be changed
Can relatively be easily reversed
All the above
Which of the following is an example of a chemical change?
Candy, when heated, turns black and gives off a bunt smell
Placing iron in water and it sinks to the bottom of the container
Cutting paper into smaller pieces
Ice being heated and melting into a liquid
Which of the following is not a correct conversion of chemical energy into thermal energy?
Rabbits using energy from food to hop around.
Your body temperature increasing during athletics
Coal is burned in a power plant
Gasoline burning in a car engine
Which is the correct conversion of energy in this picture?
Chemical to radiant
Mechanical to radiant
Chemical to thermal
Radiant into chemical energy
Some organisms must maintain a constant body temperature of around 98.6 degrees F. This is a characteristic of homeostasis. These organisms achieve this by converting?
Radiant into thermal energy
Electrical into chemical energy
Chemical into thermal energy
Thermal into chemical energy
Which of the following is/are signs of a chemical change?
Production of a gas (bubbling)
Decrease in temperature
Formation of a new substance
All the above
Radiant energy used in photosynthesis is commonly called?
Heat
Water
Carbon Dioxide
Light
How is the ice cream and running boy related?
The ice cream gives the boy the thermal energy needed to convert to mechanical energy
The ice cream gives the boy the chemical energy needed to convert to mechanical energy
The ice cream gives the boy mechanical energy to convert to chemical energy
None of the above
