Science Random Questions Flashcards
(26 cards)
what is mass
the amount of stuff in it or how tightly the atoms or molecules are packed together
what is mass measured in
grams (g) or kilograms (kg)
how do you find mass
electronic balance
which has a higher density silver or gold
silver
what is density
how tightly packed together items are
what do you need to get density
- the mass in grams
2. the volume in cm³
equation for density
mass in grams ÷ volume
mdv triangle
M
D V
what are the functions of food
prevention of disease, energy, growth & repair
what are the 6 types of food
- carbohydrates
- fats
- protein
- vitamins
- minerals
- water
what are the 3 types of carbohydrates
- sugars
- starch
- fibre
what does sugar do
a fast supply of energy. eg. sweets, fruit, honey
what does starch do
slow supply of energy eg. bread, rice, pasta, potatoes
what does fibre do
helps move food through the intestines eg. cereals, brown bread, fruit and vegetables.
what does protein do
makes muscle, hair, hormones. eg. meat, fish, egss, cheese, nuts, peas, beans.
what does fat do
may supply energy, stores food and insulates the body. eg. butter, cream, milk, margarine
what does vitamin c do
keeps skin and gums healthy
what does vitamin d do
helps form strong bones
what does iron do? (a mineral)
forms part of red blood cells. eg. red meat and green vegetables
what does calcium do? (minerals)
forma strong bones found in milk, cheese, yoghurt
food portions depend on
age, gender, activity levels, health
what is energy measured in
kilocalories (kcals) and kilojoules (kj)
what is used to test for starch and what color change when positive
iodine
blue - black
what is used to test for fat and what color change when positive
brown paper
turns transparent
