Anyone know the qn and answer about why after adding a battery to the electromagnet , the number of paper clips attracted remains no change ? I understood need to give 2 possible answers

Gumbokins:

Danlimfl:

Can help to solve this ? I got different answers from goggle

What common adaptations do the water lettuce and water moss fern have to keep their leaves afloat ?
A. They have fine hairs on their leaf surfaces
B. They have waterproof leaves
C. They have thick fleshy leaves
D. They have leaves that can trap air bubbles

(1) A and B (2) B and C (3) A,B and C (4) B,C and D

Thanks

By elimination:
B confirmed in
D is also in

however:
A: Fine hairs are usually for deterring insects from chewing
Fleshy leaves are for drought resistance, water plants may have thicker leaves that are waterproof though not considered fleshy

but if hairs on leaves are for trapping air bubbles, that means D is also correct? :scared: :nailbite:

The model answer is B and C . But I thought A and D also make sense since both plants have tiny air that trap air bubbles. So the next question will be whether the air bubbles can help the leaves to be buoyant or not.

phtthp:

What do the fine hair on the leaf surface, help in ?


If have thick fleshy leaves, any advantage ?

Fine hair to trap air to make leaves waterproof ?

Thick fleshy leaves to make them buoyant?

Can help to solve this ? I got different answers from goggle

What common adaptations do the water lettuce and water moss fern have to keep their leaves afloat ?
A. They have fine hairs on their leaf surfaces
B. They have waterproof leaves
C. They have thick fleshy leaves
D. They have leaves that can trap air bubbles

(1) A and B (2) B and C (3) A,B and C (4) B,C and D

Thanks

So is the conclusion that 2017 PSLE English is harder than 2016? My son said it was hard.