STAAR Review 2017 Question Preview (ID: 37489)

Part 1.[print questions]

A mover pushed a crate across a smooth warehouse floor a distance of 10 meters. If 250 joules of work was done, how much force (in newtons) did the mover exert on the crate to move it?
a) 2.5N
b) 25N
c) 250N
d) 2500N

The thrust from a rocket’s engine lifts the rocket into the air. Which of the following best explains why the engine’s thrust lifts the rocket?
a) An object in motion tends to stay in motion; an object at rest tends to stay at rest.
b) The greater an object’s mass, the greater its resistance to a change in motion.
c) For every action there is an equal but opposite reaction.
d) The greater the force applied to an object, the greater the object’s acceleration.

In science class, students were asked to complete a food web like the one shown below. In which numbered box on the food web should students place autotrophs?
a) Box 1
b) Box 2
c) Box 3
d) Box 4

Earth completes one rotation on its axis about every 24 hours. What would be the most likely result if Earth completed one rotation on its axis every 12 hours?
a) Earth would cycle through the four seasons more quickly.
b) Some places on Earth would experience fewer hours of daylight.
c) Earth would cycle through periods of daylight and darkness more quickly
d) Some places on Earth would experience fewer hours of darkness.

On which part of the island is the steepest slope?
a) Northeast
b) Northwest
c) Southwest
d) Southeast

A science teacher asked her students to calculate the density of a toy block. The mass of the block was 116 grams. The volume of the block was 8 cubic centimeters. What was the density of the block, expressed in grams per cubic centimeter?
a) 145.0g/cm3
b) 1.45g/cm3
c) 145g/cm3
d) 14.5g/cm3

The relative positions of Earth, the Moon, and the Sun determine the Moon and Sun’s gravitational pull on the planet. For this reason, during which phases of the Moon do the lowest tides (neap tides) occur?
a) First quarter and last quarter
b) Full moon and new moon
c) New moon and first quarter
d) Waxing crescent and waning crescent

Based on the diagram shown above and what you know about food webs, which of the following conclusions is correct?
a) Since organisms withing a food web have several food choices, all the organisms within the food web can survive.
b) Since organisms in a food web are interdependant, the disapearance of one organism in the food web could affect all organisms
c) Since both producers and consumers live within a food web, the energy available within the food web remains constant.
d) Since organisms within a food web must compete for food, the disappearance of one organism within the food web helps others

Which statement about unbalanced forces is correct?
a) Unbalanced forces change how and where an object moves.
b) Unbalanced forces always have a net force less than zero.
c) Unbalanced forces are always caused by friction and gravity.
d) Unbalanced forces affect the direction but not the speed of an object’s movement.

Between the 90-minute and 120-minute time period, Darla-
a) Sped Up
b) Slowed Down
c) Stopped Completely
d) Changed Directions

Which statement about organic compounds is correct?
a) Organic compounds contain only carbon atoms.
b) All organic compounds contain carbon atoms
c) Organic compounds are not components of organisms.
d) Very few compounds are classified as organic compounds.

Cherie observes the Moon in the phase shown below. If Cherie continues to observe the Moon, which of the following phases will she see next?
a) A
b) B
c) C
d) D

Which of the following statements about chemical changes is correct?
a) A chemical change always produces an odor.
b) A chemical change always creates one or more new substances.
c) A chemical change always changes a substance’s temperature.
d) A chemical change always changes a substance’s state of matter.

Based on the energy pyramid shown, which of the following statements is correct?
a) If the hawk population increased, the frog population would also increase.
b) All the animals shown on the energy pyramid consume grasses and grains.
c) Grasshoppers and locusts can obtain energy from producers or consumers.
d) Available energy decreases as it is transferred from one level to another.

A science teacher asked students to classify the organism shown in the picture . The organism pictured could be classified as all or the following EXCEPT-
a) Autotrophic
b) Prokaryotic
c) Eukaryotic
d) Multicellular

A chemical reaction occurs when atoms of two or more elements react with each other. Atoms of two different elements react with each other when they have-
a) unfilled outer electron shells
b) neutral electrical charges
c) stable electron arrangements
d) equal number of protons and neutrons

Which of the following bowling balls would have the greatest kinetic energy?
a) A 16-pound bowling ball resting on a ball return at a bowling alley
b) A 14-pound bowling ball rolling down a lane at a speed of 14 miles per hour
c) A 14-pound bowling ball rolling down a lane at a speed of 10 miles per hour
d) A 10-pound bowling ball rolling down a lane at a speed of 12 miles per hour

According to the theory of plate tectonics, different kinds of boundaries form when the edges of different plates meet. The diagram below shows a convergent boundary. When the plates converge, as shown above, they will most likely produce a(n
a) Fault line
b) Mid-ocean ridge
c) Underground lake
d) Mountain range

The chemical formula for three molecules of iron oxide appears below. 3Fe2O3 What is the total number of atoms in three molecules of iron oxide?
a) 15
b) 5
c) 9
d) 2

On a camping trip, the group leader lit a campfire so the campers could roast marshmallows. What energy transformations occurred when the campfire was lit?
a) Chemical energy was transformed into heat and light energy.
b) Solar energy was transformed into heat and light energy.
c) Heat energy was transformed into light and geothermal energy.
d) Chemical energy was transformed into mechanical and light energy.

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