Len Academy mid-term test questions for Basic Science JSS1, 2nd Term

Biomedic wastes are also referred to as _____ wastes.

• A. Hospital

• B. Recyclable

• C. Metabolic

• D. Green

• E. Radioactive

• F. Electronic

Sweat and urine are best considered as _____ waste.

• A. Non-Biodegradable

• B. Refuse

• C. Recyclable

• D. Metabolic

• E. Green

• F. Radioactive

_____ is defined as the process of collecting, processing, recycling and controlling any material considered as waste.

• A. Waste collecting and processing

• B. Waste processing and collecting

• C. Waste recycling and control

• D. Waste control and recycling

• E. Waste treatment

• F. Waste Management

Which of the following statement is FALSE concerning mass and weight?

• A. Mass is the amount of matter in a body

• B. The element hydrogen has the smallest mass

• C. You will weigh more on planet jupiter than earth

• D. Weight is a function of gravity

• E. Mass and Weight have different Standard International (S.I) Units

• F. None of the above

Which of the following statement is false concerning matter?

• A. Anything considered as matter must either have mass or occupy space

• B. Air is an example of matter

• C. Plasma is a state of matter

• D. Chemistry is considered as the study of matter and the changes they undergo

• E. Vacuum is a space completely void of matter

• F. Matter will always take up space no matter how small or invincible it is to the eyes

Which of the following is not matter?

• A. Atom

• B. Molecule

• C. Ion

• D. Bacterium

• E. Virus

• F. None of the above

The ultimate source of energy is _____.

1. Plant
2. Sun
3. Food
4. Water
5. Air
6. Earth

The speed of wind is measured with a wind vane.

TRUE or FALSE

Sweat in itself doesn't smell. The smell that accompanies sweat is actually caused by the presence of bacteria on your skin. This bacteria breaks the sweat coming out of your sweat pores down into acids, thus making it smell.

Deodorants contains alcohol and are antibacterial. They work by killing the bacteria that makes sweat smell

Chewing aspirin during a heart attack may be a life saver. This is true because the drug inhibits platelets from forming a clot that can block an artery of the heart, thus stopping a heart attack

The kneecaps of newly born babies are not made of bone. Rather, they are little bits of cartilage which ossifies (turns from cartilages to bone) from age 2 to 6

Ice cubes made with fresh water are white in color while those made with boiled water are crystal clear

🐈 Cats 🐈 are unable to taste sweet things

🍎 Apples 🍎 actually float on water. Other fruits that float on water include 🍋 lemons, 🍌 bananas, 🍐 pears, and 🍊 oranges

Rain water contains vitamin B12.

Vitamin B12 is an important nutrient that keeps the blood cells and neurones healthy. It also assist in building the DNA (a genetic material present in the cell's nucleus). Vitamin B12 also aid in the prevention of megaloblastic anemia which makes people weak and tired

Rasceta is the name given to the lines on your ✋ palm ✋

Goats have rectangular pupils in their eyes.

Think of the pupil as a hole located in the centre of the iris within of the eye.

Note: To get an idea of an iris; 'when one is said to have blue eyes', it's because the iris is blue

Among all land animals, 🐘 Elephants 🐘 have the longest gestation period.

They stay pregnant for 22 months before giving birth to their young

Waste Management can be defined as the process of collecting, processing, recycling and controlling any material considered as waste.

Improperly disposed waste litters on road sides, in land fills, gutters and ditches. They are generally bad for the following reasons:

• The waste block drainages hence resulting to flooding, especially during the rainy seasons.
  Please read on Erosion here.

• They generate bad smells which can be dangerous to health.

• They constitute nuisance and eyesore.

• They become homes to various disease causing organisms.
  Please read on Vectors of Diseases here.

Wastes can be classified into various types. These are:

• Biodegradable waste

• Non-Biodegradable waste

• Refuse

• Sewage

• Recyclable waste

• Electronic waste

• Green waste

• Biomedical waste

• Metabolic waste

• Radioactive waste

• Chemical waste

• Animal product waste

Please read the explanations on the classification of wastes here

The African Star Apple is a seasonal fruit that grows abundantly in Nigeria and other West African Countries. It's fondly called African Cherry, Agbalumo or Udara in some parts of Nigeria.

Below are some benefits of the African Star Apple:

• It contains high amount of vitamin C

• It contains a high amount of calcium

• It contains high amount of potassium

• It is a powerful antioxidant

• It aids in weight reduction

• It contains a high amount of iron

• Its leaves, fruits and seeds are medicinal

• It aids digestion and prevents vomiting

Please read more on the African Star Apple here

Disaccharides are composed of two monosaccharides joined together; thus are also referred to as double sugars.

Disaccharides are often added as sweeteners to food; for instance, the table sugar called sucrose is a disaccharide often used by us to sweeten our tea.

Maltose is another disaccharide used as an ingredient for making malt drinks, chocolates and candies.

The breast milk contains the disaccharide Lactose.

Lactose is very vital for the normal growth and development of infants.

In adults, disaccharides are non essential nutrients. This implies that we can live without them as adults.

Below is a summary of monosaccharides that make up disaccharides (double sugars).

• Maltose = Glucose + Glucose

• Lactose = Glucose + Galactose

• Sucrose = Glucose + Fructose

Other examples of disaccharides include trehalulose and isomaltulose

Polysaccharides are complex sugars. These are what we often eat whenever we eat carbohydrates.

We have four types of polysaccharides namely:

1. Starch
2. Glycogen
3. Chitin
4. Cellulose

• Starchy foods include rice, cassava and yam.

• Glycogen is stored in the human liver; as a result of the joining of many glucose molecules.

• Chitin is a major component of insect and anthropod's skeleton.

• Cellulose is a major component of a plant's cell wall. They cannot be digested when eaten by humans; hence they function as roughages.

Roughages are not classified as one the classes of food in humans. This is due to the fact that they aren't digested. They will rather facilitate the movement of bowels in the large intestine (colon); and for this reason, they can be very useful in treating constipation.

Please read more on carbohydrates here