Science Vocabulary

Science Vocabulary

Level 7 - Educación Continua CIDEB​

Writing a Scientific Article

Scientific article: a publication that is based on empirical evidence. It can support a hypothesis with original research, describe existing research or comment on current trends in a specific field.​

Multiple Choice

What is a hypothesis?

• A guess of what will happen in the experiment

• A proposed explanation based on the available evidence

• A summary of everything researched

• The question through which we begin our research

​Usually an "if... then..." sentence.

Poll

What does the word "variable" remind you of?

• Something that isn't constant, that varies

• Something that can be adapted

• Something that always stays the same

• A characteristic

The one that is observed or measured in the experiment: it will change as the independent variable is altered.

Dependent variable

This variable is the one that is manipulated or changed by the scientist.

Independent variable

Variables

any factor that can be manipulated, controlled for, or measured in an experiment.

Control variable

They are controlled to remain constant: they must not be changed throughout the experiment (or else, they might alter the results!)

Vocabulary for the experiments

Pay attention!

A measurement of how acidic or alkaline/basic a substance (always a liquid) is.​

Measured according to the substance's voltage / with reactants.​

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pH

Multiple Select

Why is it important to know the pH of a substance?

• The pH of a liquid is a factor of how likely can bacteria grow there

• If we know that a substance has a very low pH (is very acid) or a very high pH (very basic), we'll know if it would harm us

• Depending on the pH is whether or not a given reaction can occur

• If it is a substance in the body, its pH can determine whether or not everything is working correctly

Open Ended

A sweetener is any additive that provide a sweet taste and doesn't increase sugar levels in the blood.

What are some examples of sweeteners?

How much sweetness does the additive have.

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Measured in numbers.​

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Regular sugar (sucrose) has a sweetening power of 1

​Sweetening power

Open Ended

What are examples of oxidation you've seen in daily life? In other words, where have you seen it?

Oxidation

A reaction that occurs in the presence of oxygen, responsible for the deterioration of the quality of food products: the taste, smell, and even texture may change.

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Generally undesirable= we want to stop it.​

Focusing on food science

Draw

Draw some Jell-O

Gelatin

Basically, a lot of protein that we heat up to undo its structure and then let it cool to get it to form other bonds = another structure, trapping substances inside (even water)

Enzymes

Important substances made by the cells.

They are catalysts (substances that control how quickly chemical reactions occur). Enzymes help the body perform such tasks as digestion and growing new cells.

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They can help undo the ​bonds between proteins, sugars...

Level 7 | Science

Some fruits have enzymes