Year 9 Food Science

What happens when you shake oil and water together?

• They mix and stay mixed

• They mix but separate again after settling

• They never mix

• They form a solid

Emulsifiers are molecules that have two ends: one attracted to water (__________) and one attracted to oil (__________). Fill in the blanks.

• hydrophilic, hydrophobic

• hydrophobic, hydrophilic

• hydrophilic, lipophilic

• lipophobic, hydrophobic

What is the function of an emulsifier when added to oil and water?

• It makes them taste better

• It prevents the oil and water from separating

• It changes their color

• It makes them freeze

When making mayonnaise, what ingredient is added to oil and vinegar to act as an emulsifier?

• Sugar

• Salt

• Eggs

• Flour

What is gluten?

• Gluten is a protein found in wheat flour.

• Gluten is a type of sugar found in fruits.

• Gluten is a vitamin found in vegetables.

• Gluten is a mineral found in dairy products.

Which type of flour contains a high proportion of gluten and is used to make products such as bread?

• Self-raising flour

• Strong plain flour

• Cake flour

• Rice flour

Why is kneading necessary when making bread?

• Kneading is necessary because as bread rises the dough stretches to help hold its shape.

• Kneading is necessary to add sweetness to the bread.

• Kneading is necessary to make the bread dough cold.

• Kneading is necessary to prevent the bread from rising.

What is the role of yeast in bread dough?

• Yeast is the raising agent that makes the dough rise by producing CO2 bubbles, which are trapped by the gluten network.

• Yeast adds color to the dough by producing pigments.

• Yeast acts as a preservative to prevent the dough from spoiling.

• Yeast is used to sweeten the dough by producing sugar.

The process of changing the colour and flavour of food by breaking down starch molecules is known as _______.

• dextrinisation

• caramelisation

• fermentation

• gelatinisation

Carbohydrates are made of which three elements?

• Carbon, Nitrogen, Oxygen

• Carbon, Hydrogen, Oxygen

• Hydrogen, Nitrogen, Oxygen

• Carbon, Sulphur, Oxygen