BTEC Applied Science Level 3 - Unit 3

A students was doing an experiment using the scientific method. Every three days the student plans to count the green leaves. Which would be a good hypothesis for this experiment?

• If plants are placed in direct sunlight, then they will grow more green leaves.

• If plants are places in bright light, then they will grow more green leaves than in dim light.

• If plants are place in clay pots, then they will grow more green leaves than plastic pots.

• If plants are in warmer temperatures, then they will grow more green leaves.

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is

• the male alligators

• the gender of the alligator

• the temperature

• the incubator

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The dependent variable is

• the temperature

• the size of the baby alligators

• the incubator

• the gender of the baby alligators

Which of the following is NOT a null hypothesis?

• Cats are no smarter than dogs

• Americans enjoy hot dogs twice as much as hamburgers

• There is no difference in test scores of students who drink coffee and those that don't

• Students spend as much time on TikTok as on Instagram

Any measurement will have some ____________. This will come from variation in the data obtained and be subject to systematic or random effects. This can be estimated by considering the instruments and the method and will usually be expressed as a range such as 20 ± 2 °C.

• Error

• Precision

• Reproducibility

• Uncertainty

The black lines either side of the points are

• The error bars

• The spread of data

• Line of best fit

• Line of worst fit

Which of the following is an example of qualitative data:

• 6 red fish, and 8 black fish

• An orange roughy that's 25 years old

• 8 billion metric tons of bycatch

• The bycatch consisted of dolphins, turtles, and jellyfish

0.89, 1, 0.87, 1.01, 0.56, 0.94. Which number is most likely anomalous?

• 0.56

• 0.87

• 0.89

• 0.94

Uncertainty arises mostly from:

• Incorrect hypotheses

• Collecting data too soon

• Mixing up qualitative & quantitative data

• Procedural error while experimenting

The mean of 8.7, 9.5, 4.7, 3.8, and 6.8 is: (2 min to answer)

• 7.9

• 6.7

• 5.5