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Human Equilibrium Part 1 (level 2)
Test Description: This is part one of your review for Human Equilibrium and the DPM
Instructions: Answer all questions to get your test result.
1) 1. Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is-
A
A gas at room temperature
B
Given off by green plants
C
Useful to human beings
D
Made of two different elements
2) Compounds are different than elements because compounds are-
A
Watery made from the same type of atoms
B
Not able to be broken down into parts
C
A pure substance, elements are not.
D
Combinations of two or more elements
3) 3. How many different elements are represented in the chemical formula? CH4 + 2O2 CO2 + 2H2O
A
5
B
7
C
4
D
3
4) Which of the following is the best description of an element?
A
A collection of atoms that have different abilities when joined together
B
A naturally occurring mineral made of more than one substance
C
A small particle made with a specific chemical composition
D
A substance that cannot be broken down into simpler substances
5) Which of the following is a compound?
A
Aluminum
B
Oxygen
C
Water
D
Chlorine
6) All of the following are organic compounds except-
A
C6H12O6
B
Ca3(PO4)2
C
CH3CO2H
D
C7H9PO3
7) 9. Organic compounds can be distinguished from inorganic compounds because organic compounds always-
A
Make up the largest molecules that exist
B
Have higher boiling and melting points
C
Contain carbon and certain other elements
D
Will conduct electricity and be magnetic
8) Which two elements will be found in most organic compounds?
A
Neon and Carbon
B
Carbon and Hydrogen
C
Cobalt and nitrogen
D
Silicon and Zinc
9) Which of the following is an example of a physical change in the digestive system?
A
Digestive juices breaking food into nutrients
B
Enzymes breaking down carbohydrates into sugars
C
Saliva changing starch into simpler sugars
D
Melting an ice cube in the mouth
10) In digestion, evidence of a chemical change can be observed when -
A
Methane gas is produced in the intestines
B
Food changes shape in the stomach
C
Pieces of food get smaller during chewing
D
Solid foods become liquid in the mouth
11) Which of the following is an example of a chemical change in the digestive system?
A
Teeth chopping food into pieces
B
Saliva breaking down starch into sugar
C
Candy dissolving in the mouth
D
Tongue forming food into a ball
12) In digestion, evidence of a chemical change can be observed when -
A
Crackers get chewed into smaller pieces
B
Meat is churned and squeezed in the stomach
C
Solid chocolate melts in the mouth
D
Vegetables broken down in the intestines produce gas.
13) Which of the following is an example of a physical change in digestion?
A
Digestive juices changing food into nutrients
B
Teeth chewing food to make it easier to swallow
C
Proteins being changed into amino acids
D
Saliva breaking down starch into carbohydrates
14) Which of the following is an example of a physical change that occurs during digestion?
A
In the mouth, enzymes break down carbohydrates
B
In the intestines, fatty acids are extracted from lipids.
C
In the stomach, pepsin turns proteins to amino acids
D
In the stomach, muscle contractions mix and churn food.
15) During Digestion, which of the following energy conversions occurs?
A
Electrical Energy --------Chemical energy
B
Heat energy ------- Chemical energy
C
Chemical energy ---- heat energy
D
Mechanical energy------ Heat energy
16) A bird that eats seeds converts the energy stored in the seeds into the energy of its flight muscles. The conversion is from what kind of energy to what other kind of energy?
A
Chemical energy------mechanical energy
B
Sound energy ---- Radiant energy
C
Radiant Energy-----chemical energy
D
Mechanical energy ---- Thermal energy
17) Green plants use sunlight to make their own food in the form of glucose, this process, known as photosynthesis is an example of which of the following energy conversions.
A
Sound energy ----- radiant energy
B
Mechanical energy ------ Thermal energy
C
Radiant energy ----- Chemical energy
D
Chemical energy ---- mechanical energy
18) Animals are able to move by using the energy from the food they eat. This conversion is from what type of energy to what other type of energy?
A
Thermal Energy -------- Electrical energy
B
Chemical Energy ------mechanical energy
C
Sound Energy -------radiant Energy
D
Radiant energy ---- chemical energy
19) Which of the following organisms regularly transforms radiant energy into chemical energy?
A
Deer
B
Cow
C
Tree
D
Human
20) Roots grow downward in the soil in response to –
A
Gravity
B
Sunlight
C
Water
D
Wind
*select an answer for all questions
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