UNIT 1
UNIT 2
UNIT 3
UNIT 4
SCIE 3001
Question 01 - Living Things
Question 02 - Living Things
Question 01 - Ecosystems
Question 02 - Ecosystems
Question 01 - Earth Sciences
 

Question 1 - Living Things

day and night

Fig. 1.

1. (a) On a school yard hunt, students collected the following items: Dead leaves, plastic toy rabbit, twigs, snail shells, drain fish, ants, lizard, baby dove, rabbit, tadpoles, pebbles, soil, flowers, mushrooms, ferns, spiders, butterflies, earthworm, baby crab, iron nail.
Group the animals according to the following criteria: (i) Living, non-living, and (ii) the 5 vertebrate groups.

10 marks
(b) Students were asked to germinate seeds. Some students believed seeds needed soil, and sunlight, others felt seeds could grow on damp tissue paper at room temperature. Which group identified the correct conditions for germination? How would the identified condition support germination?
3 marks
(c) Figure 1 is an illustrated diagram of the life cycle of an insect with complete metamorphosis. Label the four stages of this life cycle.
4 marks
(d) What is the difference between complete and incomplete metamorphosis?
4 marks
(e) Indicate whether the life cycle of each of the following insects is a complete or incomplete metamorphosis: Cockroach, Butterfly, Housefly, Mosquito
4 marks
(a)(i)
Living
Non-Living
Dead leaves
twigs
snail shells
drain fish
ants
lizard
baby dove
rabbit
tadpoles
flowers
mushrooms
ferns
spiders
butterflies
earthworm
baby crab

plastic toy rabbit
pebbles
soil
iron nail

(ii)
5 vertebrate groups
Fish Amphibians Reptiles Birds Mammals
drain fish tadpoles lizard baby dove rabbit

(b) Germination is the emergence of the plumule and radicle from a seed.
It requires:

  1. Water
  2. Air
  3. Warmth

The second group identified 2 of the 3 conditions. - water from the damp tissue and warmth of room temperature.

day and night

(c)

  1. Egg
  2. Larva
  3. Pupa
  4. Adult
Complete Metamorphosis
Inomplete Metamorphosis
Four Stages - Egg → Larva → Pupa → Adult
Three Stages - Egg → Nymph → Adult
Larva do not look like adult insects. They usually have a worm-like shape - Caterpillars, maggots, and grubs
Nymphs looks like small adults, but usually don't have wings
Larvae molt their skin several times and they grow slightly larger
Insect nymphs eat the same food that the adult insect eats
Larva make cocoons around themselves
Nymphs shed or molt their exoskeletons (outer casings made up of a hard substance called chitin) and replace them with larger ones several times as they grow
Larva don't eat while they're inside their cocoons
The insects stop molting when they reach their adult size. By this time, they have usually grown wings
Their bodies develop into an adult shape with wings, legs, internal organs, etc
 
Insect
Type of Metamorphosis
Cockroach Inomplete
Butterfly Complete
Housefly Complete
Mosquito Complete

 

Concept by Kishore Lal. Programmed by Kishore Lal... Copyright © 2015 Kishore Lal. All rights reserved.