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Natural sciences

Matter, measuring and reactions

Educator section

Memorandum

Assignment 4:

1.

  • km
  • m 3
  • mm
  • g en mg
  • kl of m 3
  • m 2
  • m en cm
  • ton
  • kl of cm 3
  • light years (the distance light travels in one year)
  • Examples to explain the importance of measurement: any three good examples, e.g.
  • the amount of medicine someone has to drink
  • how much cement and sand should be mixed for building
  • to measure achievements in athletics (high jump, long jump, sprints, etc.)

Leaner section

Content

Activity: to use units of measurement and explaining why it is important to be able to measure [lo 2.4]

Before I am able to determine my expenses with regard to fuel for a planned journey, I need to know the distance that I will be travelling. If I want to tile the kitchen floor, I need to calculate the size of the floor (surface). When we want to work out how much milk a baby of a particular age and mass should get, we need to be able to measure the volume (contents) of a bottle, etc. The metric system of measurement (the Système International d'Unités , or SI) is used in most parts of the world. The most important units that we have to deal with according to the SI system of measurements are represented in the following table:

LARGE MEDIUM SMALL
Length 1 km = 1 000 m1 m = 1 000 mm kilometre (km) meter (m)centimetre (cm) millimetre (mm)
Surface 1 cm² = 100 mm²1 m² = 10 000 cm² square meter (m²) square centimetre (cm²) square millimetre (mm²)
Content 1 kℓ = 1 000 ℓ1 l = 1 000 ml kiloliter (kℓ)cubic meter (m 3 ) litre (ℓ) cubic centimetre (cm 3 )millilitre (mℓ)
Mass 1 kg = 1 000 g1 g = 1 000 mg kilogram (kg) gram (g) milligram (mg)

1. Give the units of measurement that you would use to measure the following?

  • the distance that a space shuttle travels around the earth.
  • the amount of concrete required for the foundations of a house
  • the circumference of roller skate wheels.
  • the mass of a locust.
  • the capacity of a swimming pool.
  • the size (surface) of a tennis court.
  • the length of our educator.
  • the mass of a truck.
  • the capacity of a hot water cylinder.
  • the distance from the earth to the nearest star.

2. Name three further examples to show the importance of being able to measure.

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Assessment

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.4: We know this when the learner application of knowledge: applies knowledge appropriately by connecting the learnt concept to a variation of the known situation.

Questions & Answers

explain and give four Example hyperbolic function
Lukman Reply
The denominator of a certain fraction is 9 more than the numerator. If 6 is added to both terms of the fraction, the value of the fraction becomes 2/3. Find the original fraction. 2. The sum of the least and greatest of 3 consecutive integers is 60. What are the valu
SABAL Reply
1. x + 6 2 -------------- = _ x + 9 + 6 3 x + 6 3 ----------- x -- (cross multiply) x + 15 2 3(x + 6) = 2(x + 15) 3x + 18 = 2x + 30 (-2x from both) x + 18 = 30 (-18 from both) x = 12 Test: 12 + 6 18 2 -------------- = --- = --- 12 + 9 + 6 27 3
Pawel
2. (x) + (x + 2) = 60 2x + 2 = 60 2x = 58 x = 29 29, 30, & 31
Pawel
ok
Ifeanyi
on number 2 question How did you got 2x +2
Ifeanyi
combine like terms. x + x + 2 is same as 2x + 2
Pawel
Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 1 more than 3 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 113?
mariel Reply
Mark = x,. Don = 3x + 1 x + 3x + 1 = 113 4x = 112, x = 28 Mark = 28, Don = 85, 28 + 85 = 113
Pawel
how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
find the subring of gaussian integers?
Rofiqul
hello, I am happy to help!
Shirley Reply
please can go further on polynomials quadratic
Abdullahi
hi mam
Mark
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
yes i wantt to review
Mark
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
please help me prove quadratic formula
Darius
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
Shirley Reply
thank you help me with how to prove the quadratic equation
Seidu
may God blessed u for that. Please I want u to help me in sets.
Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
can you teacch how to solve that🙏
Mark
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point For: (6111,4111,−411)(6111,4111,-411) Equation Form: x=6111,y=4111,z=−411x=6111,y=4111,z=-411
Brenna
(61/11,41/11,−4/11)
Brenna
x=61/11 y=41/11 z=−4/11 x=61/11 y=41/11 z=-4/11
Brenna
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
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Source:  OpenStax, Natural sciences grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
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