Science Smarts
What is the basic unit of life?
A cell
What is a code or cipher used for?
The hide or encrypt a message
What molecule carries genetic instructions?
DNA.
What type of substance is used in a hydraulic system?
A liquid, usually oil or water.
What is the variable that a scientist changes on purpose?
The independent variable.
What force pulls objects toward Earth?
Gravity
If A = 1, B = 2, and C = 3, what number represents D?
What are proteins made of?
Amino acids.
What does a hydraulic system use to transfer force?
Pressure through a liquid.
What do scientists call the information they collect during an experiment?
Data.
What gas do plants take in during photosynthesis?
Carbon dioxide
In a Caesar cipher, what happens to each letter?
It shifts a certain number of places in the alphabet.
What is a group of three mRNA bases called?
A codon.
What happens to pressure applied to a confined liquid?
It is transmitted through the liquid.
Why should an experiment be repeated?
To check results and make them more reliable.
What is the process called when liquid water changes into a gas?
Evaporation
Decode this Caesar cipher shifted forward by 1: DBU.
CAT.
What tool can scientists use to determine which amino acid a codon represents?
A codon wheel.
If you push down on one syringe connected to another, what should happen to the second syringe?
Its plunger moves outward/up.
A plant near a window grows taller than a plant in a dark closet. What variable might explain the difference?
The amount of light.
What organelle releases usable energy from food in most eukaryotic cells?
If a message is encoded with a shift of 3, what letter does A become?
D
If a protein is made of amino acids, what determines the order of those amino acids?
The order of codons in the genetic instructions (mRNA).
Biology
A student says fertilizer made a plant grow taller, but they also gave that plant more water. Why can't they be sure fertilizer caused the growth?
Because more than one variable changed; it wasn't a fair test.