Question

Which of the following substances is an element?
A. Air
B. Iron
C. Salt
D. Sugar
2. Elements play an important role in the human body. Which of the following is CORRECTLY paired?
A. SODIUM - maintain regular heart beat
B. POTASSIUM - antioxidant
C. IRON - relaxation of muscles
D. CALCIUM - formation and maintenance of bones and teeth
3. Nonmetals are brittle and normally used as insulators. Which of the following pairs of elements are nonmetals?
A. potassium and sodium
B. sulfur and iodine
C. tin and lead
D. calcium and zinc
4. Metals are good conductor of heat and electricity. Which element does NOT exhibit this property?
A. Aluminium
B. Chromium
C. Sulfur
D. Tungsten
5. Which of the following statement is true for both elements and compounds?
A. They are homogeneous.
B. They are the simplest form of matter.
C. They are commonly found free in nature.
D. They can be broken down into simpler
substances.

PART II: Write TRUE if the statement is correct and FALSE if it is not.
1. Carbohydrates help the food move through your body easily and protects you from having constipation.
2. FOOD LABELS or NUTRITION FACTS are tables of information found on packaged foods.
3. PROTEINS are the building blocks for all cells.
4. CALORIES help your body stay healthy.
5. Food packed which contains 5% or less cholesterol and sodium is good for one serving.

PART III: identify the essential element described in each statement.
______1. Essential to the formation and maintenance of bones and teeth.
______2. An important negatively-charged ion used to maintain fluid balance.
______3. Helps regulate the amount of water in the body.
______4. Important component of hemoglobin in the blood.
______5. Maintain regular heart beat and nerve impulses.​

Answer 1

1. IRON
2. D
3. D
4. D

PART 2;

1. CALCIUM
2. IRON
3. -
4. IRON

Answer 2

Answer:

1st iron ,2nd calcium, 3rd b ,4th chromium, 5th a, part2 1st 3,2nd calcium plz mark me as brainlest