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Intro to Biology > Introduction to Biology > Flashcards

Introduction to Biology Flashcards

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1
Q

What is science in terms of a ‘way of knowing”

A

Science is a way of gathering and analyzing information about the natural world.

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2
Q

What is the first step of the scientific method?

A

The scientific method begins with observation.

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3
Q

What is an hypothesis?

A

An hypothesis is a possible explanation of observations.

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4
Q

Why is an hypothesis important to the scientific method?

A

Without an hypothesis and experiment cannot be done. The experiment tests the hypothesis.

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5
Q

How does the attitude of skepticism help scientists?

A

Skepticism keeps scientist asking questions and looking for evidence to support ideas.

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6
Q

What attitude to scientist need to accept different ideas.

A

Open-Mindedness

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7
Q

What is a theory?

A

A theory is a well tested explanation that unifies observations and hypotheses. A theory allows scientists to make predictions in new situations.

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8
Q

How does a hypothesis relate to a theory?

A

An hypothesis tests only one explanation. A theory included many tests of different hypothesis and brings them together.

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9
Q

What is bias?

A

A particular preference of viewpoint?

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10
Q

How can bias affect the scientific method?

A

If a scientist as a specific point of view, accurate observations will not be made.

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11
Q

What is biology?

A

Biology is the study of life.

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12
Q

What is the molecule that stores the universal genetic code?

A

DNA

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13
Q

What is homeostasis?

A

Homeostasis is the stable internal environment of living things.

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14
Q

What is the smallest unit of life with which all living things are made?

A

All living things are composed of cells?

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15
Q

While most characteristics apply to all living things, which characteristics applies to groups of individual.

A

Living things evolve. Each individual cannot evolve because they have a set genetic code, but groups can change from generation to generation.

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16
Q

What is the difference between growing and developing?

A

Growing means to increase in size by producing more cells. Developing means cell specialize and take in different functions. When developing , different parts grow at different rates.

17
Q

What is the smallest unit of matter?

A

The atom.

18
Q

What are the three subatomic particles and their charge?

A

Protons are positive.
Neutrons are neutral.
Electrons are negative.

19
Q

What must be true for an atom to be neural?

A

A neutral atom has equal numbers of protons and electrons.

20
Q

How does an element differ from a compound?

A

An element is made of only one kind of atom, while an electron is made of different kinds of atoms bonded together.

21
Q

What are isotopes?

A

Isotopes are atoms of the same element with different atom masses due to different numbers of neutrons.

22
Q

If one atom of calcium has an atomic mass of 40 and another has an atomic mass of 41, how do their numbers of protons and neutron compare?

A

One atom has 20 protons and 20 neutrons, the other has 20 protons and 21 neutrons.

23
Q

What is an ionic bond?

A

An ionic bond occurs when one or more electrons is transferred from one atom to another.

24
Q

How does an ionic bond compare to a covalent bond?

A

An ionic bond involved the transfer of electrons between atoms while a covalent bond involves atoms sharing electrons.

25
Q

What does it mean for a molecule to be polar?

A

A molecule is polar if one end is more positive and one end is more negative.

26
Q

What are the two components of a solution?

A

A solution is composed of a solute dissolved In a solvent.

27
Q

What does pH measure?

A

The pH of a solution is a measure of the concentration of H+ ions, or the acidity of the solution.

28
Q

As a solution becomes more acidic, what will happen to its pH?

A

As a solution becomes more acidic the pH becomes lower.

29
Q

What is a base?

A

A base is a solution which produces OH- ions and has a pH higher than 7.

Intro to Biology (2 decks)

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