The scientist studied a variable, which is something that can change during an experiment.
A. A problem
B. Something that stays the same
C. Something that can change
D. A mistake
C. Something that can change ✅
The desert road was isolated, or completely alone, for miles.
A. Alone or separated
B. Crowded
C. Dangerous
D. Temporary
A. Alone or separated ✅
Although the path looked narrow, it was actually wide enough for two people to walk side by side.
A. Wide
B. Limited in width
C. Bright
D. Smooth
B. Limited in width ✅
Nocturnal animals, such as bats and owls, have heightened senses that help them find food at night.
A. Active at night
B. Able to fly
C. Living in trees
D. Large in size
A. Active at night ✅
Because the chemical mixture was volatile, it exploded when exposed to heat.
A. Stable
B. Colorful
C. Unstable
D. Heavy
C. Unstable ✅
The coach asked the team to save their energy, that is, to keep it for later instead of using it all at once.
A. Protect from danger
B. Keep for later use
C. Rescue someone
D. Write down information
B. Keep for later use ✅
The movie was brief, or short, compared to most films.
A. Short in length or time
B. Confusing
C. Serious
D. Loud
A. Short in length or time ✅
Unlike his generous sister, Marcus kept everything for himself.
A. Careless
B. Willing to give to others
C. Very wealthy
D. Easily distracted
B. Willing to give to others
Some predatory insects, such as praying mantises and dragonflies, have strong forelegs that help them catch other insects.
A. Living in groups
B. Hunting other animals
C. Poisonous
D. Camouflaged
B. Hunting other animals ✅
The old library was refurbished, so it attracted more visitors than ever before.
A. Damaged
B. Closed temporarily
C. Abandoned
D. Renovated or improved
D. Renovated or improved ✅
The hikers reached a summit, which is the highest point of a mountain.
A. A long trail
B. The base of a mountain
C. A meeting
D. The highest point
D. The highest point ✅
The instructions were vague, or unclear, leaving students confused.
A. Not clear or specific
B. Very detailed
C. Strict
D. Familiar
A. Not clear or specific ✅
The instructions were complex; however, the final task was simple.
A. Easy
B. Short
C. Complicated
D. Optional
C. Complicated ✅
Some students are keen, for instance, one notices tiny errors in grammar and another quickly understands new math problems.
A. Sharp
B. Cold
C. Eager
D. Noisy
A. Sharp ✅
Because the building materials were poor quality, the structure began to deteriorate.
A. Strengthen
B. Break down
C. Remain unchanged
D. Repair
B. Break down ✅
The museum displayed an artifact, meaning an object made by people from the past.
A. A natural landform
B. An ancient story
C. A human-made object from history
D. A work of art
C. A human-made object from history ✅
The lawyer faced a serious charge, or accusation, in court.
A. Payment
B. Accusation
C. Electrical power
D. Energy
B. Accusation ✅
The editor praised the writer’s bold ideas, but criticized the cautious tone of the conclusion.
A. Shy
B. Risk-taking or confident
C. Dark in color
D. Careless
B. Risk-taking or confident ✅
Mechanical devices, such as wind-up toys and music boxes, have gears and springs that make them move without electricity.
A. Made out of metal
B. Electronic
C. Expensive
D. Having parts that move
D. Having parts that move ✅
The manager’s harsh comments affected the morale of the team, causing some members to work less efficiently.
A. Ignored
B. Influenced
C. Pretended
D. Noticed
B. Influenced ✅
The artist used paint as her medium, which is the material used to create the artwork.
A. Average size
B. A person who predicts the future
C. A message
D. The material used to make art
D. The material used to make art ✅
The old house began to decay, or slowly break down, over time.
A. Improve
B. Freeze
C. Deteriorate gradually
D. Grow stronger
C. Deteriorate gradually ✅
The lecture was not tedious; instead, it kept the class engaged from start to finish.
A. Short
B. Boring
C. Confusing
D. Loud
B. Boring ✅
Migratory birds, such as geese and swallows, travel long distances each year to find warmer climates and food.
A. Preferring warm climates
B. Flying only
C. Moving from place to place seasonally
D. Living near water
C. Moving from place to place seasonally ✅
Heavy rainfall exacerbated the flooding; as a result, evacuation was necessary.
A. Made worse
B. Reduced
C. Ignored
D. Controlled
A. Made worse ✅