TEAS 7 Science Practice Questions

Which chamber of the heart receives deoxygenated blood returning from the body through the venae cavae?

1. ARight atrium
2. BLeft atrium
3. CRight ventricle
4. DLeft ventricle

Which valve lies between the left atrium and the left ventricle?

1. ATricuspid valve
2. BAortic valve
3. CMitral (bicuspid) valve
4. DPulmonary valve

Where does the exchange of oxygen and carbon dioxide between air and blood take place in the lungs?

1. ABronchi
2. BAlveoli
3. CTrachea
4. DBronchioles

Which muscle is the primary muscle of inspiration (breathing in)?

1. ADiaphragm
2. BRectus abdominis
3. CBiceps brachii
4. DGluteus maximus

In which organ does most absorption of nutrients occur?

1. AStomach
2. BEsophagus
3. CLarge intestine
4. DSmall intestine

Which organ produces bile?

1. ALiver
2. BGallbladder
3. CPancreas
4. DStomach

Which part of a neuron typically receives signals from other neurons?

1. AAxon
2. BMyelin sheath
3. CAxon terminal
4. DDendrites

Which part of the brain is chiefly responsible for coordinating balance and smooth voluntary movement?

1. ACerebrum
2. BHypothalamus
3. CCerebellum
4. DThalamus

Which organ secretes the hormone insulin?

1. ALiver
2. BPancreas
3. CAdrenal glands
4. DThyroid gland

Which structure connects one bone to another bone at a joint?

1. ATendon
2. BLigament
3. CCartilage
4. DBursa

What is the outermost layer of the skin?

1. AEpidermis
2. BDermis
3. CHypodermis
4. DFascia

What is the functional unit of the kidney?

1. ANephron
2. BNeuron
3. CAlveolus
4. DUreter

Where does fertilization of the ovum by a sperm cell normally occur?

1. AUterus
2. BOvary, as the follicle ruptures
3. CVagina
4. DFallopian (uterine) tube

Which cells differentiate into plasma cells that produce antibodies?

1. AErythrocytes
2. BPlatelets
3. CB lymphocytes
4. DNeutrophils

In the anatomical position, the elbow is ______ to the wrist.

1. Adistal
2. Bproximal
3. Csuperficial
4. Dposterior

Which of the following is an example of negative feedback?

1. AUterine contractions intensifying during labor
2. BPlatelets accumulating and recruiting more platelets during blood clotting
3. CMilk ejection during breastfeeding
4. DSweating to cool the body when body temperature rises

Which plane divides the body into anterior (front) and posterior (back) portions?

1. ASagittal plane
2. BFrontal (coronal) plane
3. CTransverse plane
4. DMidsagittal plane

Which organelle is the main site of ATP production in eukaryotic cells?

1. ARibosome
2. BGolgi apparatus
3. CLysosome
4. DMitochondrion

Which structure is found in eukaryotic cells but not in prokaryotic cells?

1. ARibosomes
2. BDNA
3. CMembrane-bound nucleus
4. DPlasma membrane surrounding the cytoplasm

In a DNA molecule, adenine pairs with which base?

1. AGuanine
2. BCytosine
3. CThymine
4. DUracil

Two parents are both heterozygous (Bb) for a trait, and B is completely dominant over b. What is the probability that a child has the genotype bb?

1. A0%
2. B50%
3. C25%
4. D75%

A heterozygous parent (Bb) is crossed with a homozygous recessive parent (bb). What percentage of offspring are expected to show the recessive phenotype?

1. A0%
2. B50%
3. C25%
4. D100%

What is the process by which an mRNA molecule is made using a DNA template?

1. ATranslation
2. BReplication
3. CTranscription
4. DDiffusion

Which of the following is the monomer (building block) of proteins?

1. ANucleotide
2. BMonosaccharide
3. CAmino acid
4. DFatty acid

Which class of macromolecules is the body's primary source of quick energy?

1. ANucleic acids
2. BLipids
3. CProteins
4. DCarbohydrates

Which subatomic particle carries a negative electrical charge?

1. AProton
2. BNeutron
3. CPositron
4. DElectron

The atomic number of an element is equal to the number of which particles in an atom of that element?

1. ANeutrons
2. BProtons
3. CProtons plus neutrons
4. DValence electrons

Which type of bond forms when two atoms share pairs of electrons?

1. AIonic bond
2. BHydrogen bond
3. CCovalent bond
4. DMetallic bond

A solution has a pH of 3 and another solution has a pH of 6. The pH 3 solution has how many times the hydrogen ion concentration of the pH 6 solution?

1. A3 times
2. B30 times
3. C100 times
4. D1000 times

In a closed system, 10 g of substance A reacts completely with 5 g of substance B to form a single product C. What is the mass of C?

1. A5 g
2. B15 g
3. C10 g
4. D50 g

What is the term for a solid changing directly into a gas without becoming a liquid?

1. ACondensation
2. BDeposition
3. CSublimation
4. DEvaporation

When table salt is dissolved in water, the salt is called the:

1. ASolvent
2. BSolute
3. CPrecipitate
4. DCatalyst

What is the SI base unit of mass?

1. AGram
2. BKilogram
3. CPound
4. DNewton

A container holds 2.5 liters of water. How many milliliters is this?

1. A2500 mL
2. B25 mL
3. C250 mL
4. D25,000 mL

Which of the following is a testable hypothesis?

1. AGreen plants are more beautiful and pleasant to look at than plants with yellow or brown leaves.
2. BIf plants receive more hours of light each day, then they will grow taller.
3. CWhy do plants need light?
4. DPlants grow in many different places.

A student waters four groups of identical bean seeds with 0, 10, 20 or 30 mL of water per day and measures plant height after 14 days. What is the independent variable?

1. AThe amount of water given daily
2. BThe height of the plants
3. CThe type of seed
4. DThe number of days before height is measured

A student tests how water temperature affects how fast sugar dissolves, recording the time needed for the sugar to dissolve completely. What is the dependent variable?

1. AThe temperature of the water in each trial
2. BThe mass of sugar used
3. CThe volume of water used
4. DThe time taken for the sugar to dissolve

In an experiment testing a new plant fertilizer, which describes the control group?

1. APlants given twice as much fertilizer
2. BPlants grown under the same conditions but without the fertilizer
3. CPlants grown in a different type of soil and given the fertilizer as well
4. DPlants that are discarded before measurement

A student studies how the amount of light affects plant growth. Which factor should be kept constant for all plants?

1. AThe amount of light
2. BThe final height of each plant
3. CThe number of leaves at the end
4. DThe amount of water each plant receives

Plants were grown for 3 weeks with different fertilizer amounts. Average height: Group A (no fertilizer) 4 cm; Group B (low fertilizer) 7 cm; Group C (high fertilizer) 11 cm. Which conclusion is best supported by these data?

1. APlant height increased as the amount of fertilizer increased.
2. BFertilizer is harmful to plants.
3. CHigh fertilizer is the best amount for every plant species.
4. DFertilizer has no relationship to plant height.

A cart moves at a constant speed. Distance traveled: after 2 s, 4 m; after 4 s, 8 m; after 6 s, 12 m. What is the speed of the cart?

1. A1 m/s
2. B3 m/s
3. C2 m/s
4. D4 m/s

Five students' resting pulse rates are 70, 72, 75, 78 and 80 beats per minute. What is the mean pulse rate?

1. A72 beats per minute
2. B74 beats per minute
3. C78 beats per minute
4. D75 beats per minute

Which action would most increase confidence in the results of an experiment?

1. ARunning the experiment once with a single sample
2. BIgnoring results that do not match the hypothesis
3. CRepeating the experiment several times with a larger number of samples
4. DChanging several variables at the same time so that more effects can be observed at once

Soil A: 12 of 20 seeds sprouted. Soil B: 18 of 20 seeds sprouted. Other conditions were the same. Which conclusion is best supported?

1. ASoil B will produce more fruit than Soil A.
2. BSoil A contains no nutrients.
3. CSprouting of every plant species depends only on soil type, regardless of water, light or temperature.
4. DIn this experiment, a higher proportion of seeds sprouted in Soil B than in Soil A.

In science, a theory is best described as:

1. AA well-substantiated explanation supported by a large body of evidence
2. BAn unproven guess
3. CThe same thing as a hypothesis
4. DA fact that can never change

When data are plotted on a graph, which variable is conventionally placed on the horizontal (x) axis?

1. AThe dependent variable
2. BThe independent variable
3. CThe control group
4. DThe constant

A student tests whether listening to music affects test scores. One group of 5th graders listens to music and a group of 10th graders takes the test in silence. Which change would best improve the design?

1. AUse students of the same grade level in both groups
2. BGive the music group a harder test
3. CTest only the music group
4. DLet students choose which group to join and which version of the test to take

Which finding would make scientists most confident that a result is reliable?

1. AOther scientists repeat the experiment and obtain similar results
2. BThe result agrees with the researcher's opinion
3. CThe result was published in a newspaper
4. DThe experiment was performed only once, but very carefully, by an experienced researcher

Which of the following statements is an inference rather than an observation?

1. AIt rained during the night.
2. BThe ground is wet.
3. CThe thermometer reads 12 degrees Celsius.
4. DThe grass is 5 cm tall.

A student measures heart rate: at rest 70 beats per minute; after 1 minute of jogging 110; after 3 minutes of jogging 130. Which conclusion is best supported?

1. AHeart rate was higher after jogging than at rest and higher after 3 minutes than after 1 minute.
2. BJogging for 10 minutes will always raise heart rate to 150.
3. CResting heart rate is 70 for every person.
4. DHeart rate is not affected by exercise.