Force, Motion And Energy 7.6B, 7.7 A, 7.7B Question Preview (ID: 17846)


Force And Motion In Everyday Life - 7th Grade Science. TEACHERS: click here for quick copy question ID numbers.

What is the initial step in the digestive process that represents a chemical change in food?
a) Churning of food and stomach acid in the stomach
b) Breaking down food by grinding and tearing with teeth
c) Saliva in the mouth that breaking down food before entering the stomach
d) Saliva in the mouth that breaking down food before entering the stomach

If you saw a diagram that showed the flow of energy within a person when they eat food and convert it into a usable form of energy for activities such as running. Which energy transformation does this process represent?
a) Chemical energy to mechanical energy
b) Chemical energy to thermal energy
c) Mechanical energy to thermal energy
d) Thermal energy to chemical energy

Consumers, like humans, need to go out and get their food for energy because they can not make their own food. What energy transformation is taking place when an animal eats food to keep warm?
a) Radiant to chemical
b) Mechanical to thermal
c) Thermal to chemical
d) Chemical to thermal

Click and drag to move During digestion, the digestive system breaks down food into nutrients used by the body. Which organelle within the cell works with the digestive system to break down food into usable energy?
a) Vacuole
b) Golgi Apparatus
c) Endoplasmic Reticulum
d) Mitochondrian

Which of the following only include examples of chemical changes that occur during digestion?
a) Chewing and swallowing of food
b) Excretion of waste
c) Reactions of saliva in the mouth and stomach acids and pancreatic juices in the stomach
d) Absorption of liquid in the large intestine

Which of the following statements is not true in relation to work being done in which A) a box is lifted, B) a wagon is pulled, and C) a girl pushes against a brick wall.
a) Work is being done in image A only
b) Work is being done in image A and B, but not C
c) Work is being done in image A and C, but not B
d) Work is being done in image A, B and C

A student exerts a force of 25 N to raise a flag 7 meters to the top of the flag pole. How much work is the student doing? Use the formula for work, Work = Force x distance.
a) 18
b) 32
c) 50
d) 175

Students compared the mass of two identical suckers, initial masses of 14 grams, after being soaked in two different solutions. The first sucker is placed in 100 ml of solution “A”. The other sucker is placed
a) Solution B is filled with chemicals that act like digestion enzymes that speed up the breaking down process.
b) Solution A is filled with chemicals that act like digestion enzymes that speed up the breaking down process.
c) Both solutions are filled with identical liquids; the sucker in solution B started at a smaller mass.
d) The flavor of the suckers were different, therefore they had different dissolving rates

. Students compared the mass of two identical suckers, initial masses of 14 grams, after being soaked in two different solutions. The first sucker is placed in 100 ml of solution “A”. The other sucker is placed. Based the students' observation of th
a) Chewing breaks down food chemically, transferring chemical energy into thermal energy
b) Food moving down the esophagus breaks down food physically, transferring mechanical energy into thermal energy
c) Absorbing water in the large intestines breaks down food physically, transferring thermal energy into chemical energy
d) Enzymes in the mouth and stomach break down food chemically, transferring chemical energy into thermal energy

Which of the following is the best example of work being done on an object?
a) Holding a 50 kg bag of sand
b) Lifting a baby from its crib
c) Keeping a board in place
d) Pushing on a car that will not move

There are two types of living cells. Which of these two cells is classified as a eukaryotic cell and why?
a) One that contain a nucleus
b) One that contains mitochondrion
c) One that contains a cell wall
d) One that contains a nucleus

Both Eukaryotic and Prokaryotic cells contain a cytoplasm. What is the function of the cytoplasm in the cell?
a) Site of photosythesis
b) Make energy for the cell
c) Hold all of the organelles in place
d) Clear jelly-like fluid inside of the cell

Cell A reproduces through the process of binary fission which produces two daughter cells. How would the parent cell and the two daughter cells relate?
a) The daughter cells would be genetically different than the parent cell
b) The daughter cells would be genetically and physically identical to the parent cell
c) The daughter cells would be genetically identical but physically different than the parent cell
d) The daughter cells would be genetically different but physically identical to the parent cell

Remembering the organization of life, what makes up organs?
a) A group of cells
b) A group of tissue
c) A group of organisms
d) A group of organelles

One major difference between sexual and asexual reproduction is that sexual reproduction -
a) Will produce identical offspring
b) Is the only way single-celled organisms can reproduce
c) There is no difference between the two types of reproduction
d) Will produce varied offspring

What kind of energy transformation takes place when a toaster is turned on?
a) Chemical to sound
b) Electrical to sound
c) Chemical to thermal
d) Electrical to thermal

A worm population has 200 individual worms. 100 of these worms feed at night (nocturnal) and 100 of them feed during the day (diurnal). The birds that feed on these worms are diurnal hunters. After a 1000 years pass, at what time of the day would you
a) You would find more nocturnal worms because according to Darwin’s Theory of “Natural Selection” the worms that feed at night
b) You would find more diurnal worms because according to Darwin’s Theory of “Natural Selection” the worms that feed at night ha
c) You would find more nocturnal worms because according to Lamarck’s Theory of “Acquired Inheritance” the diurnal worms would l
d) There would not be a change in the number of worms you found.

If the birds that prey on the worms change their eating habits and become nocturnal hunters, how would this affect the population sizes of the nocturnal and diurnal warms?
a) Nocturnal will increase. Diurnal will decrease.
b) Nocturnal will increase. Diurnal will increase
c) Nocturnal will decrease. Diurnal will decrease
d) Nocturnal will decrease. Diurnal will increase.

A change happens inside the large intestine of the digestive system. The liquid is absorbed from the waste turning it into a solid. What kind of change has occurred in the large intestine?
a) A chemical change because acid is used to absorb the liquid from the waste
b) A physical change because the waste is changing its state of matter
c) A physical change because acid is used to absorb the liquid from the waste
d) A chemical change because the waste is changing its state of matter

A researcher is studying the effect of sleep on aggression, thinking that less sleep will lead to more aggression. She has some people sleep 6 hours per night, some people sleep 3 hours per night and some people sleep as much as they want. She then m
a) IV= amount if aggressive behavior DV= amount of sleep
b) IV=amount of sleep DV=amount of aggressive behavior
c) IV=number of people in the experiment DV=amount of sleep
d) IV=amount of sleep DV=number of people in the experiment

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