Life Science
Evidence that Plants and Animals are made up of tiny cells. A. Plant and animal cells have similar parts B. Some plant cells are visible with a hands lens C. Scientist believe cells are the building block of living things. D. Scientist use microscopes to study and make images of plant and animal cells.
During an investigation, a student observes bubbles forming in a substance. Which would confirm a chemical change has occurred?
A. The substance takes up more space B. The state of the substance changes C. The color of the substance stays the same D. The substance becomes warmer without being heated
D. The substance becomes warmer without being heated
Which describes a kind of weathering?
A. wind blowing sand from dune to dune B. ocean waves dropping sand on a beach C. a river carrying sediment across a valley floor D. tree roots breaking rocks into smaller pieces
D. tree roots breaking rocks into smaller pieces
A student uses a microscope to study a leaf cell. the student also looks at an ant cell. Then he draws a diagram of both cells. Which part does the student only draw in the leaf cell diagram?
A. nucleus B. cell wall C. cytoplasm D. cell membrane
B. cell wall
A tiger cub has striped fur, brown eyes, long claws, and a loose tooth. Which is the acquired physical trait?
A. striped fur B. loose tooth C. long claws D. brown eyes
B. loose tooth
A student wants to research invertebrate animal. Which of these animals should she study? A. clam, worm, spider B. Frog, fish, clam C. worm, spider, fish D. frog, clam, worm
A. clam, worm, spider
Which object will conduct electric current in a circuit?
A. iron nail B. glass tube C. plastic toy D. wooden pencil
A. iron nail
Which statement about levees is true?
A. The limit coastal flooding B. The prevent erosion of river banks C. They allow deposition in floodplains D. The help control flooding along rivers
D. help control flooding along rivers
How do floods change Earth's surface?
A. they form wide cracks in the ground B.they cause weathering of ocean cliffs C. they build up sediment to form deltas D. they cause erosion and deposition in areas near rivers
D. They cause erosion and deposition in area near rivers
A student looks at a model of the animal cell. Which organelle contrils the movements of substances into and out of the cell?
A. nucleus B. cell membrane C. cytoplasm D. chloroplasts
B. cell membrane
A robin sings a song, hunts worms on a school lawn, builds a nest, and sleeps at night. Which behavior did the bird MOST LIKELY inherit from its parents?
A. building a nest B. singing a song C. hunting worms D. sleeping at night
A. building a nest
A student has four mixtures of pieces of solid materials. Which mixture could the student separate by using a bar magnet?
A. iron and nickel B. wood and plastic C. cobalt and copper D. aluminum and plastic
D. aluminum and plastic
Which is one way that gravity causes erosion?
A. by expanding frozen water B. by forming cracks in the ground C. by causing rivers to flow downhill D. by scraping pieces of rock together
c. by causing rivers to flow downhill
A student sees the following animals at a zoo: bat, bear, parrot, and dolphin. She classifies the parrot in one group and the other animals in another group. What are the student's groups?
A. bird, mammals B. birds, and land animals C. invertebrates, vertebrates D. animals with wings, animals without wings
A. bird and mammals
What evidence supports that some organisms are beneficial?
A. Bacteria are microorganisms B. Some bacteria cause infections C. Bacteria help people digest food D. Bacteria live in raw meat and raw eggs
C. Bacteria help people digest food
A student argues that some microorganisms are harmful. Which evidence supports this claim? A. Bacteria turns milk into cheese B. Fungi and Bacteria are decomposers C. Bacteria in raw meat can make people sick D. Algae are the main producers in oceans and lakes
C. Bacteria in raw meat can make people sick
An electromagnet is different from a bar magnet because...
A. an electromagnet only has one pole B. an electromagnet can be turned on and off C. an eletromagmet does not have a magnetic field D. an electromagnet is a bar magnet
b. an electromagnet can be turned on and off
Which is a possible effect of beach nourishment?
A. Beaches become smaller B. animals and plants are harmed C. eroded beaches are restored D.beach deposition is stopped
c. eroded beaches are restored
What happens when water vapor condenses?
A. the water particles speed up B. The water particles slow down C. the water particles move farther apart D. the water particles motion does not change
B. the water particle slow down
HOw do seeds and spores of plants compare?
A. neither grow in soil B. both occur in flowering plants C. both are parts for reproduction D. only seeds grow into new plants
C. both are parts for reproduction
A student gives a toy to a cat. The cat rolls and plays with the toy. Which question could determine whether this behavior is an instinct or learned behavior in cats?
A. What is the toy made of? B. Does the cat play with the toy every day? C. Do the cat's brothers and sisters also play with toys? D. When the cat was young, did it see its mother play with toys?
B. Does the cat paly with the toy everyday?
A student needs to separate a mixture of tiny dirt particles and water. What would be the best tools to use?
A. strainer B. pan balance C. filter paper and funnel D. tweezers and magnifying glass
C. filter paper and funnel
A scientist places several seismographs along a mountain chain. What question will the scientist find an answer from the data collected from the seismograph?
A. Where do faults occur? B. How tall are the mountains? C. How can earthquakes be prevented? D. Which parts of the mountains are formed by volcanic eruptions?
A. Where do faults occur?
An electrical circuit has a light buld, wire, battery and open switch.
Which statement explains why the light bulb is not lit?
A. The battery is dead, so there is no electrical source B. The switch is open, so the elcetricity cannot flow C. The light bulb requires more energy to light up D. The wires are not conductors so electricity cannot flow
B. The switch is open
The leaders of a coastal town want to slow the erosion of beachers of a nearby beach. Which technology should they research?
A. groins B. levees C. storm drains D. beach nourishment
A. groins