2022 Practice STAAR

Even though these puppies have the same parents, they do not all

look alike because —

• they were produced by asexual cloning

• some of the puppies have genetic material from only one of the

  parents

• each puppy has a different combination of genetic material as a

  result of sexual reproduction

• all the puppies developed from the same fertilized egg

Sodium and lithium have similar chemical properties. What

characteristic of these elements explains why they are chemically

similar?

• Their atoms both have one valence electron.

• Their atoms both have more neutrons than protons.

• Their atoms have the same number of energy levels.

• Their atoms contain equal numbers of protons and electrons

Which location around Green Peak is likely to experience the most

erosion over time?

• Location W, because location W has the gentlest slope

• Location X, because location X is near the bottom of a slope

• Location Y, because location Y has the steepest slope

• Location Z, because location Z is the flattest slope

Based on the dichotomous key, in which order does the insect

belong?

• Diptera

•  Isoptera

• Ephemeroptera

• Zoraptera

Which statements best describe the charges on the particles in this

model?

• Both particles X and Y have a positive charge.

  Particle Z has a negative charge.

• Both particles X and Y have a negative charge.

  Particle Z has a positive charge.

• Either particle X or particle Y has a positive charge.

  Particle Z has a negative charge.

• Either particle X or particle Y has a negative charge.

  Particle Z has a positive charge.

Which description best identifies the action-reaction pair between

the bird and the fence post?

• Action: The force of the bird on the wires

  Reaction: The force of the wires on the fence post

• Action: The force of the wires on the fence post

  Reaction: The force of the fence post on the bird

• Action: The force of the fence post on the bird

  Reaction: The force of the bird on the wires

•  Action: The force of the bird on the fence post

  Reaction: The force of the fence post on the bird

Farmers can best reduce negative effects on the water quality of

nearby streams and lakes by planting crops that —

• produce less oxygen

• produce less carbon dioxide

• need less fertilizer

• need less solar energy

Buffelgrass is an invasive species of grass from Africa that

outcompetes native Texas grasses for space and water. Which

long-term change to a Texas grassland would most likely occur due

to the introduction of buffelgrass?

• The population of native grasses will increase.

• The population of native grasses will decrease.

• Buffelgrass offspring will develop traits like those of native

  grasses

• Buffelgrass offspring will develop traits like those of other

  invasive species.

If the students continue at the same speed, which statement

describes the total distance traveled after 90 seconds?

• Student 1 traveled 40 m, and student 2 traveled 20 m.

• Student 1 traveled 50 m, and student 2 traveled 30 m

• Student 1 traveled 60 m, and student 2 traveled 30 m.

• Student 1 traveled 70 m, and student 2 traveled 25 m.

A star that has a luminosity of 10-2 and a temperature of 20,000 K

is most likely a —

• Main sequence

•  White dwarf

• Blue giant

• Red giant