CE Daily Challenge #08

What is the purpose of AMYLASE?

• it is an enzyme which breaks down starch

• it is the posh name for saliva

• it is the process of food being moved through the digestive system

• it is the name given to the enzymes produced by the pancreas

Answer explanation

amylASE is an enzyme that breaks starch down into glucose (tested for using Benedict's solution)

What are all the features of ARACHNIDS?

• 8 legs

• 3 body parts

• hard exoskeleton

• antennae

Answer explanation

ARACHNIDS - 8 legs, 2 body parts

insects - 6 legs, 3 body parts, 2 pairs of wings and antennae

All are Arthropods - jointed legs and feet - EXOSKELETON

What would you see if a piece of COPPER was put in MAGNESIUM SULFATE?

• brown copper appears

• the blue colour fades

• nothing

• fizzing

• gets hotter

Answer explanation

magnesium is more reactive so WILL NOT react and lose the sulfate ion...

What do we mean by an ELEMENT?

• a single particle

• the simplest type of particle

• two or more atoms joined together

• different atoms chemically joined

Answer explanation

atoms = individuals

moecules = 2 or more atoms joined

ELEMENT = simplest type of otom

compound = different atoms, chemically joined

I a single spring stretches 10cm with 2N. How much would 2 SPRINGS IN PARALLEL stretch with 2N?

Answer explanation

PARALLEL = half the stretch...

series = double

Select all the light PRIMARY COLOURS?

• red

• yellow

• blue

• green

• white

Answer explanation

not yellow!!!

As the Queen has aged, she has changed from wearing high heels to wearing flat shoes (not quite like these snow shoes). What would be the effect on her pressure on the ground?

• more pressure

• less pressure

• no change – she is the same weight

• not possible to say

Answer explanation

larger area = less pressure (force more spread out)

As part of knighting people, the Queen uses a sharp sword and hopefully does not injure the potential knights. An investigation was carried looking at the depth of a cut made by different swords when ‘placed lightly’ on a piece of plasticine. What would a suitable CONTROL variable be?

• the force used

• the type of sword

• the depth of the cut in the plasticine

• the length of the sword

Answer explanation

independent =change = sword

dependent = measured = depth of cut

CONTROL = kept the same = FORCE