Science UIL 2

Question 1

Seasons bring changes in weather. Which most likely explains why summers in
most parts of the world are hotter than other times of the year?

a. The earth’s rotation is closer to the sun
b. The sun’s rays shine directly on the earth
c. The earth’s revolution is unstable
d. The earth tilts away from the sun

Answer 1

b. The sun’s rays shine directly on the earth

Question 2

4. Which of the following is NOT used to determine if a substance is a mixture or a
   pure substance?

a. Separating chemically
b. Filtering
c. Evaporating
d. Separating physically

Answer 2

a. Seperating chemically

Question 3

13.Which is NOT an interaction that illustrates a commensalisic relationship?

a. Tree frogs and plants
b. Egrets and cattle
c. Pseudoscorpions and beetles
d. Bats and pitcher plants

Answer 3

d. Bats and pitcher plants

Question 4

31.Choose which statement does NOT describe the characteristics of a neutron.

a. Total number of neutrons can change
b. Neutron determine the identity of the element
c. Neutrons are located in the nucleus of the atom
d. Neutrons have the mass of 1 amu

Answer 4

b. Neutron determine the identity of the element

Question 5

33. How do melting points of helium, beryllium, and carbon
    relate to their position on the periodic table?

a. Increased number of protons reduces the melting point
b. Decreased number of protons reduces the melting point
c. Increased number of protons increases the melting point
d. Decreased number of protons increases the melting point

Answer 5

c. Increased number of protons increases the melting point

Question 6

42.Which of the following statements correctly identifies the relationship shown in
the electromagnetic spectrum?

a. As wavelength increases, so does the frequency
b. As frequency increases, you will reach radio waves
c. As wavelength decreases, the energy will increase

Answer 6

c. As wavelength decreases, the energy will increase

Question 7

47.What statement best describes the membrane-bound organelles and the
relationship between different types of cells?

a. Both prokaryotic and eukaryotic cells contain membrane-bound
organelles.
b. Mitochondria are the powerhouses of cells, and cells without mitochondria
are unable to convert energy.
c. Membrane-bound organelles are found in prokaryotes, not eukaryotes.
d. Membrane-bound organelles are found in eukaryotes, not prokaryotes.

Answer 7

d. Membrane-bound organelles are found in eukaryotes, not prokaryotes.

Question 8

49.On a roller coaster, where would the most work be done on the system?

a. As it goes up the second highest hill
b. As it drops down the highest hill
c. As it drops down the second highest hill
d. As it rounds a small curve in the track

Answer 8

b. As it drops down the highest hill