Key Terms - A Flashcards

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1
Q

What is Acceleration?

A

Change of velocity per second.

m/s2.

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2
Q

What does Accuracy mean?

A

This tells us how near the true value a measurement is.

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3
Q

What is an Acid?

A

Sour substance which can attack metal, clothing or skin.

pH less than 7 when dissolved in water.

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4
Q

What is Activation energy?

A

Minimum energy needed to start off a reaction.

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5
Q

What is the Active site?

A

The site on an enzyme.

Where the reactants bind.

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6
Q

What is Activity?

A

Number of atoms of a radioactive substance that decay each second.

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7
Q

What is Aerobic respiration?

A

Breaking down food using oxygen to release energy for the cells.

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8
Q

What are Algal cells?

A

The cells of algae.
Single celled or simple multicelluar organisms.
They can photosynthesise but are not plants.

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9
Q

What is an Alkali?

A

Its solution has a pH of more than 7.

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10
Q

What is Allele?

A

Version of a particular gene.

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11
Q

What is Alpha radiation?

A

Alpha particles, each compromised with 2 protons and 2 neutrons.
Emitted by unstable nuclei.

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12
Q

What is an Alternating current?

A

Electric current in a circuit that repeatedly reverses its direction.

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13
Q

What is an Amino acid?

A

Building block of protein.

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14
Q

What is Amylase?

A

Enzyme made in the salivary glands and pancreas which speeds up the breakdown of starch into simple sugars.

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15
Q

What is Anaerobic respiration?

A

Breaking down food without oxygen to release energy for the cells.

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16
Q

What is Anhydrous?

A

Describes a substance that does not contain water.

17
Q

What is an Anomaly?

A

Result that does not match the pattern seen in the other data.
It should be retested and discarded.

18
Q

What is Aqueous solution?

A

The mixture made by adding a soluble substance to water.

19
Q

What is Asexual budding?

A

Form of asexual reproduction.

Where a complete new individual forms as a bud on the parent organism eg yeast.

20
Q

What is the Atomic number?

A

Number of protons in an atom.

Sometimes called the proton number.