science yearly year 10

Question 1

sodium hydroxide plus sulfuric acid

Answer 1

sodium sulfate plus water

Question 2

copper carbonate

Answer 2

copper oxide plus carbon dioxide plus water

Question 3

Magnesium(s) plus hydrochloric acid(aq)

Answer 3

magnesium chloride(aq) plus hydrogen(g)

Question 4

silver nitrate(aq) plus sodium chloride(aq)

Answer 4

silver chloride(s) plus sodium nitrate(aq)

Question 5

Carbon(s) plus Oxygen(g)

Answer 5

carbon dioixide(g) triangle h is negative

Question 6

Calcium Carbonate(s) plus hydrochloric(aq)

Answer 6

Calcium Chloride plus carbon dioxide(g) plus water

Question 7

Net force=

Answer 7

massxacceleration

Question 8

what is net force

Answer 8

is vector sum of all forces acting

Question 9

how do you determine friction/air resistance

Answer 9

net force minus thrust force

Question 10

how does temperature increase the rate of reaction

Answer 10

increased temperature causes increased energy in the particles which causes particles to collide more often

Question 11

how does concentration increase the rate of reaction

Answer 11

the particles will collide more often

Question 12

what does a catalyst do

Answer 12

speed up a chemical reaction without changing itself

Question 13

how do organisms pass on inherited information

Answer 13

using haploid gametes

Question 14

what are chromosomes

Answer 14

chromosomes are discrete packages of genetic material that can be traced back to the two parents that produced the zygote

Question 15

what are genotypes

Answer 15

the alleles of a given gene locus:
genetic make-up, the gene itself

Question 16

what is an allele

Answer 16

One of two or more DNA sequences occurring at a particular gene locus

Question 17

what are phenotypes

Answer 17

the expression of gene locus:
physical trait, the physical result

Question 18

what is recessive

Answer 18

an allele that is not expressed at all in a heterozygote

Question 19

what is autosomal

Answer 19

a trait that is not impacted by the sex chromosome but instead by a numbered chromosome

Question 20

what is the gradient on a distance-time graph

Answer 20

speed

Question 21

what is the gradient on a displacement time graph

Answer 21

velocity

Question 22

what is the gradient on a speed-time or velocity-time graph

Answer 22

acceleration

Question 23

acceleration formula

Answer 23

velocity change over time taken =final velocity minus initial velocity over time taken

Question 24

what is newtons first law

Answer 24

if there is no unbalanced force acting upon an object it will remain at rest or at a constant velocity in a straight line

Question 25

what happens when an unbalanced force acts upon an object

Answer 25

it causes acceleration in the direction of the force

Question 26

bigger the force

Answer 26

larger the acceleration

Question 27

greater the mass

Answer 27

smaller the acceleration

Question 28

net force is measured in

Answer 28

newtons

Question 29

what is newtons third law

Answer 29

when a force acts an equal and opposite force reacts/pushes back

Question 30

what happens to the instantaneous velocity vector of the Earth as it rotates around the sun

Answer 30

it is at a tangent of the circle

Question 31

length of string=

Answer 31

length of radius=r

Question 32

circ of circle=

Answer 32

2piR

Question 33

time for one complete orbit =

Answer 33

t(one period)

Question 34

orbital speed and instantaneous tangential velocity=

Answer 34

v=distance over time=2piR over t

Question 35

centripetal acceleration=

Answer 35

ac=veloocitysquared over radius

Question 36

centripetal force=

Answer 36

Fc=massxvelocitysquared over radius